Nickel tetracarbonyl, Ni (CO)4, decomposes upon heating by the following reaction?

Question

Nickel tetracarbonyl, Ni(CO)4, decomposes upon heating by the following reaction:

Ni(CO)4 ----> Ni (s) + 4 CO (g) ΔH = +160.7 kJ

A.) Is the reaction exothermic or endothermic?
B.) Calculate the enthalpy change for 1.0 grams of Ni(CO)4
C.) How many grams of Ni(CO)4 decompose when 1 kJ of heat is absorbed?

Answer 1

a. the + sign means endothermic.
b. work out the Mr of Ni(CO)4. 1/Mr x 160.7 is your answer.
c. 1/160.7 x Mr is, this time, your answer.

Over to you!