Thermodynamics

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

• mass
• work done
• force
• pressure

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Which best describes ENTROPY?

• Useful heat energy needed to drive an engine
• Heat that can be stored to be used at a later date
•   Random energy that escapes from the system
• A state of order in a physical system

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Which state of H₂O  has the greatest entropy?

• Ice
• Water
• Vapor

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Which statement is true about the ENTROPY?

• Entropy refers to DISORDER, the unusable energy that escapes a system.
• Entropy refers to the balance of temperature among two or more systems.
• Entropy refers to the average kinetic energy of the molecules.
• Entropy refers to the inability to destroy or create energy. 

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As a system becomes more disordered, entropy

• remains the same
• increases
• decreases
• cannot be determined

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The first law of thermodynamics is a restatement of the

• Zeroth law of thermodynamics
• law of heat addition
• principle of entropy
• conservation of energy

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Which is an example of decreasing entropy in a closed system?

• Boiling water

• Freezing water

• Cells in a body coming together

• Ice melting

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The picture shows two completely identical mason jars. They're both filled with the same gas, only one of them has more in it (more molecules). What can you say about the pressures of both jars?

• P₁ > P₂ (greater pressure in jar 1)

• P₁< P₂ (greater pressure in jar 2)

• P₁ = P₂ (same pressure in both)

• There's not enough info to tell

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Which would have more entropy?

• Frozen ice cream
• Liquid Ice cream

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Rank the following samples from greatest kinetic energy of the molecules to least kinetic energy of the molecules:

• A > B > C > D
• B > A > C > D
• B > A > D > C
• D > C > B > A

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