The calorie (4.184 J) is defined as the quantity of energy needed to raise the temperature of 1.00 g of liquid water by 1.00°C. The British thermal unit (Btu) is defined as the quantity of energy needed to raise the temperature of 1.00 lb of liquid water by 1.00°F.
(d) If natural gas costs $0.66 per therm, what is the cost per mole of methane? (Assume that natural gas is pure methane.)