One compartment of an insulated rigid tank contains 2 kmol of CO2 at 20C and 150 kPa

Question:

One compartment of an insulated rigid tank contains 2 kmol of CO2 at 20°C and 150 kPa while the other compartment contains 5 kmol of H2 gas at 35°C and 300 kPa. Now the partition between the two gases is removed, and the two gases form a homogeneous ideal-gas mixture. The temperature of the mixture is
(a) 25°C
(b) 29°C
(c) 22°C
(d ) 32°C
(e) 34°C