Chapter 13, Problem 66A

Interpretation Introduction

Interpretation:

In the ideal gas law, the unit of temperature needs to be determined.

Concept introduction:

The ideal gas equation is represented as follows:

$PV=nRT$

Here, P is pressure, V is volume, n is number of moles, R is Universal gas constant and T is temperature.

Answer to Problem 66A

Temperature must be in Kelvin.

Explanation of Solution

Charles’ Law states that at constant pressure, volume is directly proportional to the Kelvin temperature for a given amount of gas.

$V\propto T(K)$

Ideal gas law is derived using this equation of Charles’ Law

Therefore it must be in Kelvin for ideal gas law too.

Conclusion

The unit of temperature in which it should be expressed for equation of ideal gas law is Kelvin.