the second law of thermo dynamics

When applying the first law of thermodynamics to a system, when is heat a positive quantity?

• when the system does work
• when the system has work done on it
• when the system absorbs heat
• when the system loses heat
• when no work is done either on the system or by the system

Tags

NGSS.HS-PS3-4

The product of the pressure and volume of a system  has the same SI units as which one of the following choices?

• force
• work
• acceleration
• momentum
• impulse

The internal energy of a system is the difference of heat exchange

and the work done.

• TRUE

• FALSE

The first law of thermodynamics is a restatement of the

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

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A thermodynamic system where no exchange of heat takes place between system and surrounding is...

• Isothermal process

• Adiabatic process

• Isobaric process

• Isochoric process

Tags

NGSS.HS-PS3-4

What does the "U" stand for the formula ∆U = Q + W

• Heat
• Temperature
• Work
• Internal energy

A thermodynamic system where no exchange of heat takes place between system and surrounding is...

• Isothermal process

• Adiabatic process

• Isobaric process

• Isochoric process

Tags

NGSS.HS-PS3-4

Which of the following equations is the equation for calculating the work done by a gas in a piston?

• W=Fd

• W=PΔV

• ΔV=Ad

• A=πr²

For an isothermal process, which of the following statements is correct?

• a. Work, heat, and internal energy all undergo changes.

• d. No work is done; internal energy change is due to heat.

• c. Work and heat balance each other, so that there is no change in internal energy.

• d. No energy is transferred as heat; internal energy change is due to work.

Symbol that indicates that energy is released.

• U

• Q

• -Q

• W

Tags

NGSS.HS-PS1-4