Question

h₃c₆h₅o₇ in water: the final temperature of the solution was less than the initial temperature. this indicates that the reaction did not exchange heat with the surroundings. the sign of $q_{reaction}$ is positive, which is calle select an answer na₂co₃ in absorbed heat from released heat to

Explanation:

Step1: Analyze temperature change

When the final temperature of the solution is less than the initial temperature, the reaction absorbs heat from the surroundings.

Step2: Determine heat - exchange with surroundings

Since the temperature of the solution drops, the reaction absorbs heat from the surroundings, not releasing heat to or having no heat - exchange with the surroundings.

Step3: Determine the sign of $q_{reaction}$

For an endothermic reaction (absorbing heat from the surroundings), the sign of $q_{reaction}$ is positive.

Answer:

The reaction absorbed heat from the surroundings. The sign of $q_{reaction}$ is positive.