PLEASE HELP!! 25 grams of methane is placed inside a constant volume calorimeter. After the fuel is burned, the temperature rises by 4.5 deg C. If the heat capacity of the calorimeter is 5.75 kj/deg C what is the heat released?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.