76. Two thermally insulated vessels 1 and 2 are filled with air at temperatures
( T1,T2) volume (V1,V2) and pressure (P1,P2) respectively. If the valve joining the two vessels is opened, the temperature inside the vessel at equilibrium will be
(a) T1 +T2 (b) (T1 +T2 )/2
(c) [T1T2( P1V1 + P2 V2)]/( P1V1T2 + P2 V2 T1 ) (d) [T1T2( P1V1 + P2 V2)]/( P1V1T1 + P2 V2 T2 )
Answer-c
(8)