Car manufacturers are developing engines that use H2 as fuel

Car manufacturers are developing engines that use H2 as fuel. In locations where hydroelectric plants produce inexpensive electric power, the H2 can be made industrially by the electrolysis of water.

a) How many coulombs are needed to produce 1.9 x 10^6 L of H2 gas at 12.0 atm and 25 degrees C? (Assume the Ideal Gas Law applies)

b) If the coulombs are supplied at 1.54 V, how many joules are produced?

c) If the combustion of oil yields 4.0 x 10^4 kJ/kg, what mass of oil (in kg) must be burned to yield the number of joules in part (b)?

Solution

(a) 2.0 x 1011 C (b) 3.0 x 1011 J (c) 7.5 x 103kg oil)