Question

A student adds a chemical to a beaker, and the temperature of the solution drops from 25°C to 15°C. What does this temperature decrease indicate about the energy flow in the reaction?

(1 point)
Responses

The reaction absorbed energy from its surroundings.
The reaction absorbed energy from its surroundings.

The reaction created energy that was then destroyed.
The reaction created energy that was then destroyed.

The reaction released energy into its surroundings.
The reaction released energy into its surroundings.

The reaction did not involve any transfer of energy.
The reaction did not involve any transfer of energy.

Answer 1

The reaction absorbed energy from its surroundings.

Reason: the solution cooled (25°C → 15°C), so heat flowed out of the surroundings into the reaction (an endothermic process).