Problem: The same reaction, with exactly the same amount of reactant, is conducted in a bomb calorimeter and in a coffee-cup calorimeter. In one of the calorimeters, qrxn = -12.5 kJ and in the other qrxn = -11.8 kJ. Which value was obtained in the bomb calorimeter? (Assume that the reaction has a positive ΔV in the coffee-cup calorimeter.)
FREE Expert Solution
Bomb calorimeter → constant volume:
Coffee cup calorimeter → constant pressure, but volume changes
- work done by reaction = -PΔV
Therefore, qsoln from coffe cup calorimeter is lower than for bomb calorimeter
Problem Details
The same reaction, with exactly the same amount of reactant, is conducted in a bomb calorimeter and in a coffee-cup calorimeter. In one of the calorimeters, qrxn = -12.5 kJ and in the other qrxn = -11.8 kJ. Which value was obtained in the bomb calorimeter? (Assume that the reaction has a positive ΔV in the coffee-cup calorimeter.)
Frequently Asked Questions
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.
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Based on our data, we think this problem is relevant for Professor Helquist's class at LUC.