Question

Which profile best describes the reaction c(s) + 2h2(g) > ch4(g)?

Answer 1

Apex answer: If deltaH = -74.9 kJ, it is an exothermic reaction.

Step-by-step explanation:

The value is negative, which means it's exothermic. In this reaction, the graph at the beginning (reactants) should be higher than the products (ending).

Answer 2

This is a combination reaction.

In combination reactions, two or more reactants react together to form one product.

C(s) + 2H₂(g) → CH₄(g)

There are two reactants in above reaction as C(s) and H₂(g). But there is only one product as CH₄(g).