1. A student has drawn the following thermogram for two different reactions (4 p

Question

1. A student has drawn the following thermogram for two different reactions (4 points) Which thermogram represents an endothermic reaction? two represents a reaction with H -57.2 kJ.mol1? Which of these thermograms represents a reaction where heat transferred from system to surroundings? Which of the following thermograms could represent the reaction of HCl with KOH? 2. Fill the spaces with correct answer (4 points) · The device used to measure heat . If AH formation for N204 2N2O is 57.93 KJ, AH The enthalpy of a reaction equals the heat of the same f magnesium with HCI could be 3- From the following enthalpy changes (2 points) s (s) + 3/22 (g) SO3 (g) 2 SO2 (g) + O2 (g) 2 SO3 (g) H 395.2 kJ H 98.2 kJ Calculate the value of H for the reaction S (s) +O2 (g) SO2 (g).

Explanation / Answer

I am solving the question number 1 with multiple sub-parts as per chegg guidelines

Q1)

a) Endothermic reaction means the energy of products is greater than the energy of reactants, hence graph 1 represents the same (red isotherm)

b) Since Delta H is negative, hence reaction is exothermic which means products are at lesser energy than reactants, hence the graph 2 (blue isotherm)

c) Heat transferred from system to surroundings means endothermic process which means the red isotherm

d) HCl + KOH is highly exothermic reaction, since the reaction of acid + base, hence blue isotherm will be the correct choice

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