For an exothremic reaction

A. Only enthalpy change (ΔH) is negative

B. Only internal energy change (ΔE) is negative

C. Both ΔH and ΔE are negative

D. Enthalpy change is zero

Answer: Option C

Solution(By Examveda Team)

During exothermic reaction since the heat is given out by the system the thermal energy decreases and therefore the internal energy decreases leading to a decrease in enthalpy.