two streams are entering a mixer;

the first one is at 122 oC and it is consisted of 0.9524 molar fraction of ethylene and 0.0476 molar fraction of ethane. the molar flow rate of the frst stream is 869.4 kmol/h

the second stream entering the mixer is consisted of water vapor entering at 350 oC. the molar flow rate of the second stream is 1543 kmol/h

the outlet stream's molar fraction is 0.3432 of ethylene and 0.0172 of ethane and 0.6396 of water.

Calculate the outlet temperature with creating an overall heat balance on the mixer

Dont forget to mention the cp values you used in the calculations.