Posted by **Tulika** on Monday, April 9, 2012 at 12:49am.

When an ideal diatomic gas is heated at constant pressure then what fraction of heat given is used to increase internal energy of gas?

- Physics (12th Grade) -
**Damon**, Monday, April 9, 2012 at 1:12am
If it is heated at constant pressure, the volume must increase

heat in = change in internal energy + work out

dQ = dU + dW

P V = n R T

constant pressure

P dV = n R dT = work out

Change in internal energy = n Cv dT = n(5/2)R dT for diatomic gas

total heat required = n R dT + (5/2)n R dT

so our answer is (5/2) / (1+5/2)

= 5/(2+5) = 5/7

## Answer This Question

## Related Questions

- Chemistry - Science (Dr. Bob222) - Nitrogen gas has values of Cv and Cp of 20.8 ...
- physics(HELP..) - A diatomic ideal gas is heated at constant volume until its ...
- physics - A diatomic ideal gas is heated at constant volume until its pressure ...
- physics - A diatomic ideal gas is heated at constant volume until its pressure ...
- Physics Last Question HEEEELLLPPP ! - #1 The internal energy of the gas in a ...
- physics - Ok, so I know I already posted another really long question but we ...
- physics - pls.. help me with this i really need it.. pls. A gas in a cylinder ...
- CHEMISTRY - A diatomic ideal gas is heated at constant volume until its pressure...
- physics - Initially 1.200 mol of an ideal gas in a container occupies a volume ...
- Physics - Initially 1.200 mol of an ideal gas in a container occupies a volume ...

More Related Questions