Problem: The vapor pressure of ammonia at several different temperatures is shown below. Temperature (K)  Pressure (torr)20065.3210134.3220255.7230456.0235597.0Determine the normal boiling point of ammonia.

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FREE Expert Solution

We’re being asked to determine the normal boiling point of ammonia. We’re given the vapor pressure at different temperatures. 


For this problem, we can use the Clausius-Clapeyron Equation:

lnP2P1=-ΔHvapR1T2-1T1


where:

P1 = vapor pressure at T1

P2 = vapor pressure at T2

ΔHvap = heat of vaporization (in J/mol)

R = gas constant (8.314 J/mol•K)

T1 and T2 = temperature (in K).


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Problem Details
The vapor pressure of ammonia at several different temperatures is shown below.


 Temperature (K Pressure (torr)
20065.3
210134.3
220255.7
230456.0
235597.0


Determine the normal boiling point of ammonia.

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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.

What professor is this problem relevant for?

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