Percent Deviation from Ideality

Question

Using the Ideal Gas equation I calculated a temperature of 162K, and with the Van der Waals equation 177K.

I need to find the percent deviation from ideality.

 

Is this correct?

 

177-162    x 100   =9.26%

   162

Answer 1

Given that the "actual" temperature of a non ideal gas that calculated from the Van der Waal equation, then the deviation is 177K - 162K = 15K.  The percent deviation is 15K/177K (x100%) = 8.47%