SOLUTION: A gas occupies a volume of 5.0 L at 77oC. If the volume of the gas changes to 4.0 L, what is the new temperature (in K) of the gas at constant pressure? a.310K b. 280

Use   = const  for ideal gas,


where p is the pressure, V is the volume and T is the absolute temperature (in Kelvins).


In your case p = const and can be excluded.


So, you have   = const in this case;

from this condition find new temperature.