If an ideal gas expands adiabatically wi...

If an ideal gas expands adiabatically will its temperature increase or decrease? Use first law of thermodynamics to justify your answer.

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When a gas expands adiabatically , does it perform any work? If ,yes what is the source of its energy?

When a gas expands adiabatically , does it perform any work? If ,yes what is the source of its energy?

Knowledge Check

Temperature of an ideal gas increases in

A

adiabatic expansion

B

adiabatic compression

C

isothermal expansion

D

isobaric expansion

One mole of an ideal gas expands adiabatically from an initial temperature T_1 to a final temperature T_2 . The work done by the gas would be

A

`(C_P-C_V)(T_1-T_2)`

B

`C_P(T_1-T_2)`

C

`C_V(T_1-T_2)`

D

`(C_P-C_V)(T_1+T_2)`

One mole of an ideal gas expands reversibly and adiabatically from a temperature of 27^@C . If the work done during the process is 3 kJ, then final temperature of the gas is ( C_V = 20 J/K )

A

100K

B

150K

C

195K

D

255K

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