(a) 2 moles of an ideas gas is heated at constant pressure so that its temperature increases from `27^@C` to `127^@C`. Find work done by the gas.
(b) In a process, the volume of gas increases from 1000 cc to 2000 cc at constant pressure 100 kPa. Find work done by the gas.

Explanation

Here pressure is constant
`DeltaW=PDeltaV=nRDeltaT`
(a) `DeltaW=nRDeltaT=2xx8.3xx(127-27)`
`=1660J`
(b) `DeltaW=PDeltaV=P(V_2-V_1)`
`=100xx10^3(2000-1000)xx10^-6`
`=100J`