AP Chemistrymediummcq1 pt
In a coffee-cup calorimeter, a reaction releases 5.0 kJ. What happens to the water?
A.It absorbs 5.0 kJ and warms up
B.It releases 5.0 kJ and cools
C.Its temperature stays constant
D.It evaporates completely
Explanation
Core Concept
The calorimeter is insulated, so heat lost by the reaction transfers to the surroundings (the water): q_surroundings = −q_system. The water's temperature rise, measured via q = mcΔT, gives the reaction's ΔH.
Correct Answer
AIt absorbs 5.0 kJ and warms up
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