Sunday
April 20, 2014

Homework Help: chemistry

Posted by Rachelle on Sunday, November 30, 2008 at 10:07pm.

What pressure would have to be applied to steam at 325C to condense the steam to liquid water (H vap = 40.7 kJ/mol)?


Responses






Dr bob please! Chemistry - GK, Friday, November 28, 2008 at 11:47pm
Use the Clausius-Clapeyron Equation to calculate the vapor pressure at 325C. That is the pressure that must be applied to condense the steam at 325C.
Ln(P2/P1) = (∆H/R)[(T2-T1)/T2T1]
P1 = 1 atm
∆H = 40700J
R = 8.3145 J/K.mol
T2 = (325+273) = 598K
T1 = (100+273) = 373K
P2 = (unknown)

[NOTE: The pressure needed is quite high]



Dr bob please! Chemistry - Rachelle, Sunday, November 30, 2008 at 10:06pm
i solved for lnx=4,852,725

whats next? and i relaly cant put it into the calc. it says (overflow)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Dr bob please! Chemistry - hi, i think this prob has to do what you did the last...
AP Chemistry - what pressure would have to be applied to steam at 350.degress C...
Chemistry - Calculate the amount of energy in kilojoules needed to change 225 g ...
Chemistry - How much energy does it take to convert 0.800 kg ice at -20.C to ...
Chemistry - 18.0 g of liquid water is initially at 0 C. How much heat, in kJ, ...
Chemistry 106 ch 11 - Calculate the heat released when 73.5 g of steam at 122.0 ...
Chemistry - Calculate the heat released from 61.5 g of steam at 111 degrees C is...
chemistry - How much energy (in kJ) is released when 16.4 g of steam at 121.5 ...
chemistry - Calculate the energy in the form of heat, in kJ, required to convert...
Chemistry - How much energy (in kilojoules) is released when 12.8 g of steam at ...

Search
Members