calculate the heat for the reaction 3C2H2 (g) --> C6H6 (l)?

Question

From the following heats of reaction,

2C (graphite) + H2 (g) --> C2H2 (g) H = 227 kJ

6C (graphite) + 3H2 (g) --> C6H6 (l) H = 49 kJ

calculate the heat for the reaction

3C2H2 (g) --> C6H6 (l)

Answer 1

We can use the Hess Law:

DH(reaction) = np x DH (products)f - nr x DH (reactants)f

where "f" means "formation". So ,we are using the heats of formation of products and reactants to calculate the Heat of this reaction and DH means Heat of reaction, nr = number of moles de reactants, np = number of moles of products.

In this case:

DH (reaction) = np x DH(C6H6)f - nr x DH(C2H2)f
DH (reaction) = (1) 49 kJ - (3) (227) kJ

Finally:

DH (reaction) = -632 kJ

That´s it!

Good luck!

Answer 2

in basic terms a sprint ingredient that's exciting i think of you need to use platinum for this and do this reaction at typical situations. ( room temp, a million atm of rigidity) The Catalyst isn't used up by any ability although you will get steel fatigue. All this does is decrease the activation capability and speed the reaction up.