ment Score: 767/2000 Resources Hint Che Question 15 of 20 > Given the thermochemical equations X,...

Question

Question

science chemistry

Answer 1

Answer #1

Lets number the reaction as 1, 2, 3, 4 from top to bottom

required reaction should be written in terms of other reaction

This is Hess Law

required reaction can be written as:

reaction 4 = -2 * (reaction 1) +2 * (reaction 2) +3 * (reaction 3)

So, ΔHo rxn for required reaction will be:

ΔHo rxn = -2 * ΔHo rxn(reaction 1) +2 * ΔHo rxn(reaction 2) +3 * ΔHo rxn(reaction 3)

= -2 * (-310.0) +2 * (-130.0) +3 * (-220.0)

= -300 KJ

Answer: -300 KJ

Answer 2

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