An ideal gas expands from 100cm3to200cm3 at a constant pressure of 2.0×105Pawhen50J of heat is supplied to it. Calculate
(a) The change in internal energy of the gas
(b) The number of moles in the gas if the initial temperature is 300 K.
(c) The molar heat capacity Cp at constant pressure and
(d) The milar heat capacity Cv at constant volume
P = 2×105 Pa dQ = 50 J
(a) dQ = dU + dW
⇒ dU = 30 J.
(b) 30 = n ×32×8.3×300
[U = 32 nRt for monoatimoc ]
(c) dU = nCvDT
(d) Cv = 12.5