this is a preexam for this tuesday. Need help solving and understand please.

Benzene has a heat of vaporization of 30.72 kJ/mol, and a normal boiling point of 80.1 deg. Celsius. At what temperature does benzene boil when the external pressure is 745 torr?

well since I have a pressure, and i have what seems to be 2 temperatures, 1 i gotta find. I have to use the ln (p2/p1)= - Delta H vap / R (1/t2 - 1/t1) right?

Question

this is a preexam for this tuesday. Need help solving and understand please. 

Benzene has a heat of vaporization of 30.72 kJ/mol, and a normal boiling point of 80.1 deg. Celsius. At what temperature does benzene boil when the external pressure is 745 torr? 

well since I have a pressure, and i have what seems to be 2 temperatures, 1 i gotta find. I have to use the ln (p2/p1)= - Delta H vap / R  (1/t2 - 1/t1) right?

lilsis76 · Answer

@aaronq when you get a chance, do you think you can help me with this problem please. thank you.

aaronq · Answer

lol why did you post this in the history section? 

i'll help you but please re post it in the chem section

lilsis76 · Answer

oh haha. I didnt notice that my laptop is loosing connection and i clicked on chem it musta lead me here hahah sorry everyone!! :D