Kindly answer this question :

dear student 
 According to the first law of thermodynamics, ‘’energy cannot be created or destroyed, it can be transformed from one form to another. It means the amount of energy in the decomposition of the yellow complex H3NSO2 is the same as the formation of yellow complex H3NSO2, only sign is opposite. Because decomposition of the yellow complex H3NSO2is an endothermic reaction while formation of the yellow complex H3NSO2is exothermic reaction. Thus the standard enthalpy of formation of H3NSO2 is -40 kJ mol−1.
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