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

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

Tags

NGSS.HS-PS3-4

Which state of H₂O  has the greatest entropy?

• Ice
• Water
• Vapor

Tags

NGSS.HS-PS3-2

Transfer of heat in a gas or liquid by the motion of particles in the heated fluid

• conduction

• convection

• radiation

Tags

NGSS.HS-ESS2-3

1200 J of heat are added to a sample of gas while the gas does 400 J of work on the environment. What is the change in internal energy of the gas?

• 800 J

• 1600 J

• -800 J

• -1600 J

Tags

NGSS.HS-PS3-1

During process A, from state 1 to state 2, the temperature of the ideal gas

• stays the same

• increases

• decreases

• is half as much

Tags

NGSS.HS-PS3-2

During an adiabatic process, a sample of gas does 400 J of work on the environment. What change occurs with the internal energy of the gas?

• The internal energy increases by 400 J.

• The internal energy doesn't change.

• The internal energy decreases by 400 J.

• There is not enough information if we don't know how much heat was added or removed.

Process B on the PV diagram is an ______________ process.

• adiabatic

• isobaric

• isochoric

• isothermal

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A system comprising a single phase is called a

• (a) closed system

• (b) open system

• (c) isolated system

• (d) homogeneous system

• (e) heterogeneous system.

In an irreversible process, there is a

• (a) loss of heat

• (b) no loss of heat

• (c) gain of heat

• (d) no gain of heat.