Problem: Which of the following statements are true?a. ΔH for an endothermic reaction is positive.b. ΔH for an exothermic reaction is positive.c. When energy is transferred as heat from the system to surroundings, ΔH is negative.d. When energy is transferred as heat from the surroundings to the system, ΔH is negative.e. The evaporation of water is an exothermic process.f. Combustion reaction is exothermic.

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Which of the following statements are true?

a. ΔH for an endothermic reaction is positive.

b. ΔH for an exothermic reaction is positive.

c. When energy is transferred as heat from the system to surroundings, ΔH is negative.

d. When energy is transferred as heat from the surroundings to the system, ΔH is negative.

e. The evaporation of water is an exothermic process.

f. Combustion reaction is exothermic.