Classify each of the following as exothermic or endothermic:c. The metabolism of glucose in the body provides energy.

The vaporization of Br2 from the liquid to the gas state requires 7.4 kcal/mol (31.0 kJ/mol).What is the sign of ∆H for this process? Write a reaction showing heat as a product or reactant.

Oxygen can be converted into ozone by the action of lightning or electric sparks: 3 O2(g) ⇌ 2 O3(g)For this reaction, ∆H = +69kcal/mol (+285 kj/mol) and K = 2.68 x 10^-29 at 25 °C.Is the reaction exothermic or endothermic?

Hydrogen chloride can be made from the reaction of chlorine and hydrogen: Cl2(g) + H2(g) → 2 HCl(g)For this reaction, K = 26 x 10^33 and ∆H = -44 kcal/mol(-184 kJ/mol) at 25 °C.Is the reaction endothermic or exothermic?

a. What is measured by the heat of reaction?

Classify each of the following as exothermic or endothermic:b. The energy level of the products is higher than that of the reactants.

Classify each of the following as exothermic or endothermic:b. In the body, the synthesis of proteins requires energy.

Classify each of the following as exothermic or endothermic:a. CH₄(g) + 2O₂(g) →∆ CO₂(g) + 2H₂O(g) + 802kJ

The equation for the formation of silicon tetrachloride from silicon and chlorine is (7.9)Si(s) + 2Cl₂(g) → SiCl₄(g) + 157 kcalb. Is the energy of the product higher or lower than the energy of the reactants?