Finding lung volume when body temperature increases from 36°C to 39°C

[student54321]

Homework Statement

People who are angry sometimes say that the feel as if they will explode. If a calm person with a lung capacity of 3.5L and a body temp of 36C gets angry, what will the volume of the persons lungs be if their temp rises to 39C.

Homework Equations

V1/T1 = v2/T2

The Attempt at a Solution

I did it like this:
Declared variables; v1=3.5L, v2 = *?*, T1 = 36C, T2=39C

put them into the formula; 39(3.5) = 36(V2)
and ended up getting 3.79L instead of the correct answer which is 3.53L.

Obviously I have zero idea of what I am doing if I get an answer wrong. Only answer if you understand what you're talking about. Thanks.

 

[Ygggdrasil]

When using gas laws, you should always use absolute temperature (temperature in kelvins)! Otherwise, the way you set up the calculation is correct.