# Problem: Two aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter. The reaction causes the teperature of the resulting solution to fall below room temperature. Which of the following statements is TRUE?a) The products have a lower potential energy than the reactants.b) This type of experiment will provide data to calculate ΔE rxn. c) The reaction is exothermic. d) Energy is leaving the system during the reaction. e) None of the above statements is true.   The same reaction in a bomb and coffee-cup calorimeter :a) will give the same value for ΔH rxn because it is the same reaction. b) will give the same value for ΔH rxn because both systems are identical.c) will give the same values because both systems are at a constant pressure. d) will give slightly different values because the coffee-cup calorimeter will do some PV work. e) will give slightly different values because the bomb calorimeter will do some PV work.

###### FREE Expert Solution
94% (390 ratings)
###### Problem Details

Two aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter. The reaction causes the teperature of the resulting solution to fall below room temperature. Which of the following statements is TRUE?

a) The products have a lower potential energy than the reactants.

b) This type of experiment will provide data to calculate ΔE rxn

c) The reaction is exothermic.

d) Energy is leaving the system during the reaction.

e) None of the above statements is true.

The same reaction in a bomb and coffee-cup calorimeter :

a) will give the same value for ΔH rxn because it is the same reaction.

b) will give the same value for ΔH rxn because both systems are identical.

c) will give the same values because both systems are at a constant pressure.

d) will give slightly different values because the coffee-cup calorimeter will do some PV work.

e) will give slightly different values because the bomb calorimeter will do some PV work.

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-Volume Calorimetry concept. You can view video lessons to learn Constant-Volume Calorimetry. Or if you need more Constant-Volume Calorimetry practice, you can also practice Constant-Volume Calorimetry practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofTwo aqueous solutions are both at room temperature and are t...as medium difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Jules took 3 minutes and 53 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Gunasekera's class at UIUC.