Question

Helium is used to inflate football-shaped balloons that will be released in Memorial stadium for the opening game of the football season. One 2.00 liter balloon pressurized to 2.00 atm will float nicely on a hot day (35.0◦C). Unfortunately, a cold front moves through on opening day, and the temperature dips to 15.0◦C! The balloons look like PICKLES instead of footballs. What is the new volume of each balloon? Answer in units of liters.

Answer 1

Use Charle's Law ( P= const):

$\frac{V_1}{T_1}= \frac{V_2}{T_2}$

$\frac{2.00}{35.0+273}= \frac{V_2}{15+273}$

$V_2= 1.87 L$