Liquid butane c4h10 and liquid propane c3h8 are stored in cylinders, to be used as fuels. the normal boiling point if butane is -0.5 celcius and heat of vaporization is 23.1kj/mol. the corresponding values for propane are -42.5 celcius and 15.4 kj/mol.

1.) how much energy is required to vaporize 185g of butane at its boiling point? the heat of vaporization of butane is 23.1kj/mol.

2.) what volume will 185g of butane occupy at 745 torr and 35 celcius?