6. The heat of combustion of CH4 is 890.4kJ/mol, and the specific heat capacity of H2O is 75.2 J/(molK). What mass of methane is required to convert 1L of water at 298K to water vapor a 373K ? The heat of vaporization of water is 40.65kJ/mol. The density of water is 1g/mL. Hint: Use the density of water to find moles of water. Second Hint: How much energy is required to heat I L of water from 298K to 373K ? Draw a heating curve for this process. Third Hint: Ho many moles of methane, CH4, must combust to yield the same amount of energy required to hee the water? (3)