Two moles of an ideal monoatomic gas occupies a volume V at 27°C. The gas expands adiabatically to a volume 2V. Calculate (a) the final temperature of the gas and (b) change in its internal energy.
(a) (i) 189 K (ii) 2.7 kJ
(b) (i) 195 K (ii) -2.7 kJ
(c) (i) 189 K (ii) -2.7kJ
(d) (i) 195 K (ii) 2.7 kJ