#
**Problem**: If ΔHvap for water is 40.7 kJ/mole, calculate Pvap of water at 37°C.(a) 6.90 torr(b) 12.4 torr(c) 18.7 torr(d) 25.4 torr(e) 52.6 torr

###### FREE Expert Solution

###### FREE Expert Solution

We’re being asked to **determine the P _{vap} of water at 37°C**. We’re given the heat of vaporization of water ΔH

_{vap}= 40.7 kJ/mol. We can use the

**to solve for the P**

*Clausius-Clapeyron Equation*_{vap}of water.

$\overline{){\mathbf{ln}}{\mathbf{}}\frac{{\mathbf{P}}_{\mathbf{2}}}{{\mathbf{P}}_{\mathbf{1}}}{\mathbf{=}}{\mathbf{-}}\frac{\mathbf{\u2206}{\mathbf{H}}_{\mathbf{vap}}}{\mathbf{R}}\mathbf{[}\frac{\mathbf{1}}{{\mathbf{T}}_{\mathbf{2}}}\mathbf{-}\frac{\mathbf{1}}{{\mathbf{T}}_{\mathbf{1}}}\mathbf{]}}$

where:

**P _{1}** = vapor pressure at T

_{1}

**P _{2}** = vapor pressure at T

_{2}

**ΔH _{vap}** = heat of vaporization (in J/mol)

**R** = gas constant (8.314 J/mol•K)

**T _{1} and T_{2}** = temperature (in K).

###### Problem Details

If ΔH_{vap }for water is 40.7 kJ/mole, calculate P_{vap} of water at 37°C.

(a) 6.90 torr

(b) 12.4 torr

(c) 18.7 torr

(d) 25.4 torr

(e) 52.6 torr

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Clausius-Clapeyron Equation concept. You can view video lessons to learn Clausius-Clapeyron Equation Or if you need more Clausius-Clapeyron Equation practice, you can also practice Clausius-Clapeyron Equation practice problems .

How long does this problem take to solve?

Our expert Chemistry tutor, Shreya took 3 minutes to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Purse's class at SDSU.