Can someone check my work (Hvap/Hcond Calculation)

[Lori]

Homework Statement

I don't have an answer key to these questions and it's my first time dealing with problems like this. so was wondering if my process is correct!

Homework Equations

q = m*deltaT*C
q = mols*Hvap

The Attempt at a Solution

So, my reasoning behind this work is that there was heat released from cooling and also heat from condensation. So, i found heat from cooling from the equation q = mdeltaTC = 2.53 J/gC * 30g * 9.5 = 721.05 joules = 0.72105 KJ. The heat heat from vaporization is just mols*Hvap = 48.221 KJ

Added together = 48.221 KJ. Was wondering if this is correct?

 

[Borek]

Logic behind looks OK, but why 30 g?

 

[Lori]

Logic behind looks OK, but why 30 g?

i converted the 1.25 mol to mass with MM. is this correct?

 

[Borek]

And what is molar mass of methanol?

 

[Lori]

And what is molar mass of methanol?

Gotcha. Plugged it into calculator. Should be 40 grams