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How many mol of CH4 are in a 150 L tank exerting a pressure of 20.0 atm when the temperature is 24.0 degrees Celsius?

Summary:

1. Recognize the problem as Ideal Gas Law Problem. To help recognize the problem we note the substance is referred to as a gas either implicitly or explicitly and any information in the problem are physical properties of the substance, i.e., pressure, volume, temperature,mol, density, or mass of the gas.

2. Recognize the problem has only one condition, it is a single variable problem.

3. Write the Ideal Gas Equation; PV = nRT

4. Construct a table and assign a value from the problem statement to each of the variables in the Ideal Gas Equation.

5. Convert units of each variable intot he units corresponding to the value of R; 0.0821 L atm mol-1 K-1

6. Substitute the values into the equation and solve for the unknown.

 

What evidence in the problem statement suggests this is a Gas Law Problem?

Expert's Response

Complete the following table by entering the values for each of the variables;

P
V
n
R
T
Condition

L atm mol-1 K-1
1

Expert's
Response

Express each variable in terms of the unit that corresponds to the units in R.

P
V
n
R
T
Condition

L atm mol-1 K-1
1

Expert's
Response

Write the form of the Ideal Gas Law appropriate for this problem.

Expert's
Response

Solve for the unknown.

Expert's
Response

 

 

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