Problem: Which describes the enthalpy change associated with an endothermic reaction?a. It is negative because the enthalpy of the products is greater than the enthalpy of the reactants.b. It is positive because the enthalpy of the products is greater than the enthalpy of the reactants.c. It is negative because the enthalpy of the reactants is greater than the enthalpy of the products.d. It is positive because the enthalpy of the reactants is greater than the enthalpy of the products

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We are being asked to describe the enthalpy change associated with an endothermic reaction.


Recall that the endothermic reactions

gain/requires energy, absorbs heat, temperature of the surroundings decreases
 involves breaking bonds (for phase change: solid  liquid  gas)

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Problem Details

Which describes the enthalpy change associated with an endothermic reaction?
a. It is negative because the enthalpy of the products is greater than the enthalpy of the reactants.
b. It is positive because the enthalpy of the products is greater than the enthalpy of the reactants.
c. It is negative because the enthalpy of the reactants is greater than the enthalpy of the products.
d. It is positive because the enthalpy of the reactants is greater than the enthalpy of the products

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