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Wednesday, April 29, 2015

Ideal Gas Law Problems

Category: Chemical Engineering Math

"Published in Newark, California, USA"

 What is the volume of 18.0 grams of pure water at 4°C and 1 atm?

Solution:

From the given word problem, it is about Ideal Gas Law because the weight, temperature, and pressure of pure water are given and we need to solve for the volume. 

The Ideal Gas Law is given by the equation


where:  

P = pressure of a gas or vapor
V =  volume of a gas or vapor
n = moles of a gas or vapor
T = absolute temperature of a gas or vapor
n = universal gas law constant

The number of moles of pure water is
 
 

The absolute temperature of pure water is 
 
 

The universal gas law constant for gmole, K, and atmosphere is .

Therefore, the volume of pure water is