Consider these reactions where M represents a generic metal

1. 2M(s) +6HCl(aq) --> 2MCl3(aq)+3H2(g) (deltaH)= -725.0 kj

2. HCl(g)-->HCl(aq) (deltaH)= -74.8kj

3. H2(g)+CL2(g) --> 2HCl(g) (deltaH)=-1845.0kj

4. MCL3(s) --> MCl3(aq) (deltaH)= -476.0kj

Use the information above to determine the enthalpy of the following reaction.

2M(s)+3Cl2(g) ---> 2MCl3(s) (deltaH) =??? kj

1 answer

deltaH = -725.0 kj + (-74.8 kj) + (-1845.0 kj) + (-476.0 kj) = -3221.8 kj