Physics - 3/2/22

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

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

Is this phase change representing an exothermic or endothermic reaction?

GAS to LIQUID

• Exothermic

• Endothermic

Is the phase change representing an exothermic or endothermic reaction?

SOLID to LIQUID

• Endothermic

• Exothermic

“When thermal energy is converted into work, some thermal energy is always transferred to the surroundings.”

• True
• False