Apentix/AP Chemistry/Unit 6: Thermodynamics/Question
AP Chemistrymediummcq1 pt

25.0 g of metal at 100 °C is dropped into 50.0 g of water at 20 °C; the final temperature is 24 °C. What happened?

A.Metal lost heat equal to the heat water gained
B.Water transferred mass to the metal
C.The metal absorbed all the water's heat
D.Temperatures equalized by chance

Explanation

Core Concept

In an insulated system q_metal + q_water = 0. The metal's heat loss exactly balances the water's gain until both reach thermal equilibrium at the same temperature.

Correct Answer

AMetal lost heat equal to the heat water gained

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