A fixed mass of gas has a pressure of 8700 Pa, a volume of 10.5 m3 and temperature of 68 °C. The pressure and volume of the gas are changed to 9 243 Pa and 14.4 m3. The new temperature of the gas is
Assuming ideal gas, use the formula
P1 * V1 / T1 = P2 * V2 / T2
Substitute the given, and don't forget to convert temperature to absolute temperature (K units).
Celsius to Kelvin conversion:
K = C + 273