A student drops substance A into substance B. What will happen?

Question

A. Substance A will become warmer as heat flows from substance A to substance B.
B. Both substances will reach 25 degrees Celsius due to heat exchange.
C. Both substances will reach 50 degrees Celsius due to heat exchange.
D. After some time passes, the substances will reach the same temperature.

Answer 1

The correct answer is:

D. After some time passes, the substances will reach the same temperature.

When two substances at different temperatures are combined, heat will flow from the hotter substance to the cooler substance until thermal equilibrium is reached, meaning both substances will have the same temperature. The final equilibrium temperature will depend on the specific heat capacities and masses of the substances involved.