what mass of butane, c4h10, is required to heat 5.75 gallon of h2o from 28.0°c to 100.°c? density of h2o = 1.00 g/ml; specific heat capacity of h2o = 4.184 j/g°c; δh° of combustion of c4h10 = –126 kj/mol; 1 gal = 4 qt; 1 qt = 946.4 ml