Given 2C + 2 H2 →C2H4 ∆H=52.3 What mass of C is needed to react with Hydrogen with 160 kJ of energy?

Question

Thermochemical equations

Answer 1

The 52.3 kJ indicates the amount of heat needed for 2 moles of C to react with 2 moles of H2. Thus..

160 kJ x 2 mol C/52.3 kJ = 3.06 moles of C

mass of C = 3.06 moles C x 12 g/mol = 36.7 g of C needed