Problem: Which of the following is true if an exothermic reaction occurs out in a coffee-cup calorimeter?A. ΔH of the reactants is lower than ΔH of the products B. ΔH of the products is lower than ΔH of the reactants C. ΔH of the reactants is higher than ΔH of the products D. ΔH of the products is higher than ΔH of the reactants E. Two of the above

FREE Expert Solution

We are asked which of the following is true if an exothermic reaction occurs out in a coffee-cup calorimeter


Recall that:

Exothermic reactions

lose energy, releases heat, temperature of the surroundings increases
▪ involves bond formation (for phase change: gas → liquid → solid)
ΔH is negative


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Problem Details

Which of the following is true if an exothermic reaction occurs out in a coffee-cup calorimeter?

A. ΔH of the reactants is lower than ΔH of the products 

B. ΔH of the products is lower than ΔH of the reactants 

C. ΔH of the reactants is higher than ΔH of the products 

D. ΔH of the products is higher than ΔH of the reactants 

E. Two of the above

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Constant-Pressure Calorimetry concept. You can view video lessons to learn Constant-Pressure Calorimetry Or if you need more Constant-Pressure Calorimetry practice, you can also practice Constant-Pressure Calorimetry practice problems .

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