General Chemistry: Consider the following reaction:?

Question

CH3OH(g) --> CO(g) + 2H2(g) detla H = +90.7 kJ

a) calculate the amout ofheat transferrred when 55.0 g of CH3OH(g) are decomposed by this reaction at constant pressure...

b) If the enthalpy change is 17.0 kJ, how many grams of hydrogen gas are produced?

Answer 1

a. One mole is 32.0g, so 55.0 g is 1.71 moles. Delta H = 155 kJ (to three sig figs).

b. Moles of reactant = 17.0/90.7 = 0.187 moles. Thus 0.374 moles of H2 are produced with a mass of 0.748 g