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Quizzes > High School Quizzes > Science

Closed System Practice Quiz

Sharpen Your Understanding with Focused Quiz Questions

Difficulty: Moderate
Grade: Grade 10
Study OutcomesCheat Sheet
Paper art representing a trivia quiz about Closed System Showdown for high school science students.

Which of the following best defines a closed system in thermodynamics?
A system that exchanges energy but not mass with its surroundings.
A system that exchanges both energy and mass with its surroundings.
A system that exchanges neither energy nor mass with its surroundings.
A system that exchanges mass but not energy with its surroundings.
A closed system exchanges energy (such as heat or work) with its surroundings while keeping its mass constant. This distinguishes it from an isolated system, which does not exchange either mass or energy.
Which of the following is an example of a closed system?
A sealed flask containing a liquid that is heated.
An open bowl of boiling water.
A running car engine that releases exhaust.
A fish tank with continuous water exchange.
A sealed flask confines the matter inside while allowing energy (heat) to be transferred in or out, making it a closed system. The other options allow mass to enter or leave the system, which does not meet the closed system criteria.
How does a closed system differ from an isolated system?
Both systems allow the exchange of energy.
A closed system exchanges energy but restricts mass transfer, while an isolated system exchanges neither energy nor mass.
An isolated system allows energy transfer but not mass, whereas a closed system can exchange mass.
Both systems prohibit any exchange with the surrounding environment.
The key difference is that a closed system can exchange energy (like heat or work) with its surroundings, while an isolated system prevents both energy and mass transfer. Recognizing this distinction is fundamental in thermodynamics.
In a closed system, which quantity remains constant during interactions with the surroundings?
Mass remains constant, although energy can be exchanged.
Both mass and energy remain constant.
Only energy remains constant.
Both mass and energy are variable.
A closed system does not allow mass to cross its boundaries; however, energy in the form of heat or work can be transferred. This constancy of mass is a defining feature of closed systems.
Which factor is allowed to change in a closed system?
The energy of the system.
The mass of the system.
Both mass and energy simultaneously.
Neither mass nor energy changes.
In a closed system, the mass remains fixed while energy can be exchanged with the surroundings. This permits changes in properties like temperature and pressure while holding the amount of matter constant.
Which of the following scenarios accurately represents a closed system setup in a laboratory experiment?
A sealed pressure cooker on a stove.
An uncovered hot plate.
A container with an open lid.
A ventilated oven.
A sealed pressure cooker confines the sample, ensuring that no mass is lost or gained, while still allowing energy in the form of heat to enter. The alternative setups permit mass exchange with the environment.
How is energy conserved in a closed system when internal processes convert energy from one form to another?
Energy is transformed between forms but the total energy remains constant.
Energy is destroyed during the conversion process.
Energy increases as work is performed without bound.
Energy escapes the system, breaking conservation.
Even though energy within a closed system may change form - from kinetic to thermal, for example - the total energy remains conserved according to the first law of thermodynamics. This balance between energy forms is a core concept in energy conservation.
Which of the following describes an example where a system is mistakenly assumed to be closed?
A refrigerator left open, where cold air continuously escapes.
A sealed container with a tightly locked lid.
A test tube with a small, controlled opening for pressure release.
A thermos flask designed to minimize heat transfer.
A refrigerator with its door open allows the exchange of both mass (cold air escapes) and energy, even though it might be presumed to function as a closed system. The other options are designed to limit such exchanges, maintaining closed system conditions.
Which energy form is most commonly exchanged in a closed system?
Heat.
Mass.
Matter.
Chemical elements.
In closed systems, it is energy in the form of heat (or work) that is typically exchanged with the surroundings. Mass remains constant by definition.
What happens when a closed system undergoes an adiabatic process?
No heat is transferred, but work may be done on or by the system.
Mass is exchanged with the environment.
Both heat and work are exchanged with the environment.
Heat is transferred but no work is performed.
During an adiabatic process in a closed system, there is no heat exchange with the surroundings, although work can still be done. This process emphasizes energy transformation without thermal energy input or output.
Why is the conservation of mass a defining characteristic of a closed system?
Because it does not allow matter to cross its boundaries.
Because it prohibits energy transfer.
Because both energy and mass are simultaneously conserved.
Because it prevents any form of change within the system.
A closed system is characterized by its inability to exchange mass with its surroundings, ensuring that the total mass remains constant. This principle is crucial in distinguishing closed systems from open systems.
Which of the following laboratory setups does NOT represent a closed system?
A reaction taking place in an open beaker.
A reaction in a sealed container.
A sealed reaction vessel with temperature control.
A pressure vessel that prevents substance exchange.
An open beaker allows substances (mass) to enter or leave the system, which disqualifies it as a closed system. The other setups are designed to restrict mass transfer.
How does a closed system respond to an external energy input?
It undergoes a change in internal energy without a change in mass.
It increases both its mass and energy.
It changes its mass while maintaining steady energy levels.
It remains completely unchanged.
When energy is added to a closed system, the internal energy of the system is affected, manifesting as changes in temperature or pressure, while the mass remains constant. This exemplifies the energy transfer characteristic of closed systems.
Which process in a closed system does not involve mass transfer?
A constant volume process in a sealed container.
Evaporation occurring in an open container.
A chemical reaction with escaping gases.
A distillation process with continuous material reflux.
A constant volume process in a sealed container ensures that no mass is exchanged with the surroundings, fitting the definition of a closed system. The other options permit the escape or addition of matter.
Which law of thermodynamics is most directly demonstrated by energy conservation in a closed system?
The first law of thermodynamics.
The second law of thermodynamics.
The third law of thermodynamics.
The zeroth law of thermodynamics.
The first law of thermodynamics, which emphasizes the conservation of energy, is clearly illustrated in closed systems where energy can only change forms but the total energy is maintained. The other laws address aspects like entropy and equilibrium.
Consider a thermodynamic system undergoing an isothermal expansion process in a closed container. Which statement best explains the energy dynamics?
The system's internal energy remains constant because the work performed is balanced by heat influx.
The system's internal energy increases due to continuous mass addition.
The system loses internal energy because no heat is exchanged.
The internal energy fluctuates unpredictably.
In an isothermal process, the temperature of the system remains constant, which means that any work done by the system is exactly offset by heat absorbed. This balance results in no net change in internal energy, adhering to the first law of thermodynamics.
In a multi-component closed system, how can changes in energy distribution be analyzed without considering mass transfer?
By applying the first law of thermodynamics, considering that energy changes arise solely from heat and work transfer.
By measuring variations in mass throughout the process.
By tracking changes in chemical composition that alter the mass.
By evaluating pressure changes while ignoring energy exchanges.
Since the mass in a closed system remains constant, the analysis of energy changes can focus entirely on the contributions of heat and work as prescribed by the first law of thermodynamics. This approach simplifies the study of energy distribution without the need to account for mass transfer.
During a cyclic process in a closed system, what net change in internal energy is expected?
Zero net change in internal energy over one complete cycle.
A consistent increase in internal energy.
A steady decrease in internal energy.
Fluctuating changes with no predictable pattern.
In a cyclic process, the system returns to its initial state at the end of each cycle. According to the first law of thermodynamics, this means there is no overall change in the internal energy of the system over one cycle.
How does the concept of a closed system aid in the simplification of energy calculations in thermodynamics?
It ensures that mass remains constant, allowing energy exchanges to be isolated for analysis.
It allows both mass and energy calculations to be disregarded.
It simplifies calculations by assuming that no work is ever done.
It permits unlimited energy exchange with the environment.
By maintaining a constant mass, closed systems eliminate the complexity of mass transfer calculations. This lets scientists focus solely on energy exchanges such as heat and work, consistent with the first law of thermodynamics.
What potential pitfall should scientists be aware of when designing experiments that assume a system is closed?
Inadvertent mass transfer through leaks or evaporation can compromise the system's closed status.
Ignoring energy transformations may lead to misinterpretation of results.
Overlooking changes in ambient temperature is the primary concern.
Assuming that closed systems do not follow conservation laws.
Even small leaks or unintentional evaporation can allow mass to escape, meaning that the system is not truly closed. Recognizing and controlling these potential issues is essential to ensure experimental integrity.
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Study Outcomes

  1. Understand the fundamental characteristics of closed systems in physical science.
  2. Differentiate between closed and open systems using real-world examples.
  3. Analyze energy transfer processes within closed systems.
  4. Apply closed system concepts to solve related practice problems.
  5. Evaluate the role of system boundaries in controlling matter and energy interactions.

Quiz: Which is a Closed System? Cheat Sheet

  1. Energy Exchange in Closed Systems - In a closed system, energy can flow across the boundary as heat or work, but matter stays put. This setup lets us track energy changes without worrying about mass flying in or out. It's a foundational concept that simplifies many physics analyses! Learn more
  2. First Law of Thermodynamics - The First Law tells us that the change in internal energy (ΔU) equals heat added to the system minus the work it does on the surroundings (ΔU = Q − W). This conservation principle is like an energy budget for any closed system. Understanding it helps you predict how systems heat up, cool down, or do work! Discover the details
  3. Sealed Piston - Cylinder Example - Picture a piston locked in place so no gas can escape; as the gas inside expands or compresses, energy transfers happen, but the mass stays constant. This classic setup makes closed”system behavior crystal clear. It's a hands-on way to see thermodynamic laws at work! See the example
  4. Simplifying Complex Physics - By isolating a region as a closed system, physicists strip away external mass flow and focus on internal interactions like heat transfers and work. This reductionist approach turns messy real”world situations into manageable problems. It's a trick every student should have in their study toolkit! Get the breakdown
  5. Chemistry in a Closed Container - In chemistry experiments, a closed system locks in reactants and products so you can measure reaction rates and energy changes precisely. No molecules sneak out, ensuring your data reflects only what happens inside. It's essential for accurate thermochemical studies! Explore the chemistry
  6. Entropy and the Second Law - The Second Law states that in a closed system, entropy - or disorder - tends to increase, driving processes toward equilibrium. This natural "spread-out" of energy explains why heat flows from hot to cold. Grasping this helps you predict the direction and feasibility of real processes! Dive into entropy
  7. Thermos Flask as a Closed System - A trusty thermos is designed to block heat transfer, trapping the temperature of your coffee or soup for hours. It minimizes both conduction and radiation, making it a near”perfect closed system for everyday use. Seeing theory in action has never been tastier! Check out the science
  8. Analyzing Energy Conservation - Closed systems are the go”to model for studying how energy moves and transforms, from engines to ecosystems. With mass fixed, you can write clear energy balances and solve for unknown heats or works. Mastering this sets you up for success in any physical science course! Learn the techniques
  9. Frictionless Box Model - Imagine a box sliding on a frictionless surface with no external pushes; it keeps gliding forever thanks to energy conservation in a closed system. This idealized scenario highlights how kinetic and potential energies interplay without outside disturbances. It's a neat thought experiment to test your understanding! Experiment virtually
  10. Piston - Cylinder in Real Processes - Whether in car engines or steam turbines, piston - cylinder assemblies often act as closed systems during compression and expansion strokes. Studying these cycles reveals how work output and heat input shape efficiency. It's real”world thermodynamics you encounter every time you start your car! Uncover the cycle
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