The volume expansivity of a gas under constant pressure is `0.0037`. Calculate its volume at- `100^(@)C` if its volume at `100^(@)C` is `685 cm^(3)`.

Explanation

Volume expansivity of a gas means increase or decrease in volume per degree rise or fail in temperature of its volume at `0^(@)C`.
`V_(t)=V_(0)+0.0037xxV_(0)xxt=V_(0)(1+0.0037 t)`
At `100^(@)C" " V_(100^(@)C)=V_(0)(1+0.0037xx100)=685"cm"^(3)" " ("Given")" or " V_(0)=(685)/(1.37)=500" cm"^(3)`
At `-100^(@)C," " V_(-100^(@)C)=500[1+0.0037xx(-100)]=315" cm"^(3)`