Question

using enthalpy diagrams consider these equations. ch₄(g) → c(s) + 2h₂(g) δh₁ = 74.6kj c(s) + 2cl₂(g) → ccl₄(g) δh₂ = -95.7kj 2h₂(g) + 2cl₂(g) → 4hcl(g) δh₃ = -184.6kj ch₄(g) + 4cl₂(g) → ccl₄(g) + 4hcl(g) δh₄ = -205.7kj complete this based on the diagram. arrow b: endothermic exothermic

Explanation:

Step1: Recall endothermic and exothermic definitions

Endothermic reactions absorb heat (positive $\Delta H$), exothermic release heat (negative $\Delta H$).

Step2: Analyze the direction of heat flow in the context of the diagram

Arrow B points downwards, indicating a decrease in enthalpy. A decrease in enthalpy means heat is released.

Answer:

exothermic