Thermo quiz #2

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

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The transfer of thermal energy between objects of different temperatures is called...

• temperature
• heat
• internal energy
• none of these

Tags

NGSS.HS-PS3-4

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

By visual inspection, order the PV diagrams shown in Figure 12.4 from the most negative work done on the system to the most positive work done on the system.

• a, b, c, d

• a, c, b, d

• d, b, c, a

• d, a, c, b

When an ideal gas expands at constant pressure, the change in the internal energy must be positive.

• True

• False

A gas is heated by supplying it with 250 kJ of

energy; at the same time, it is compressed

so that 500 kJ of work is done on the gas.

Calculate the change in the internal energy of

the gas.

• 250 kJ

• 750 kJ

• -250 kJ

• 500 kJ

Tags

NGSS.HS-PS3-1

If an ideal gas is compressed isothermally, which of

the following statements is true?

• Energy is transferred to the gas by heat.

• No work is done on the gas.

• The temperature of the gas increases.

• The internal energy of the gas remains constant.

• None of those statements is true

Tags

NGSS.HS-PS3-4

A steady force pushes in the piston
of a well-insulated cylinder. In this
process, the temperature of the gas

• Increases
• Stays the same
• Decreases
• Not enough info

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A Thermodynamic process is said to be Isovolumetric. This means that...

• ∆U = 0
• Q = 0
• W = 0
• none of these