Butane is a common fuel used in cigarette lighters and camping stoves. normally supplied in metal containers under pressure, the fuel exists as a mixture of liquid and gas, so high temperatures may cause the container to explode. at 25.0°c, the vapor pressure of butane is 2.30 atm. what is the pressure in the container at 109.0°c? (ah vap 24.3 kj/mol.)