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Please help!!

Methylamine has a vapor pressure of 344 torr at -25∘C and a boiling point of -6.4∘C .

Find ΔHvap for methylamine.

I know that ln(P1/P2)=(ΔHvap/R)(1/T2-1/T1) but it doesn't indicate whether the boiling point is the "normal boiling point". Am I on the right track or do I just assume it's a constant pressure?

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  1. update: I figured it out.

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  2. What was the answer?

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