Thermodynamics

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

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

Process B on the PV diagram is an ______________ process.

• adiabatic

• isobaric

• isochoric

• isothermal

An electrical heater supplies heat to a system at a rate of 100W. The system performs work at a rate of 75 joule per second. At what rate is the internal energy increasing?

• 75W

• 25W

• 100W

• No Change

Second law of theromodynamics defines

• A.Heat

• B.Work

• C.Enthalpy

• D.Entropy

• E.Internal energy

During process D, from state 4 to state 1, the ideal gas...

• is increasing temperature.

• is doing work on the environment.

• is decreasing pressure.

• is decreasing temperature.

8. What is the molar specific heat of a isothermal & adiabatic process respectively

• ∞ , 0

• 0, ∞

• 0, 0

• None Of the above

10. 1 Calorie is equal to

• 3.2 J

• 5.2J

• 3.6 J

• 4.2 J

2.Internal energy depends on

• Only pressure

• Only Volume

• Only Temperature

• Only Mass

If the temperature of the source is increased, the efficiency of carnot heat engine

• Increases

• Decreases

• Remains constant

• First increases then becomes constant