The chemical reaction between HCl (aq) HCl (aq) and NH3 (aq) NH3 (aq) is represented above. A student combines equimolar amounts of HCl (aq) HCl (aq) and NH3 (aq) NH3 (aq), both solutions initially at 24°C24°C, in a coffee-cup calorimeter. The student observes that the mixture reaches a temperature of 28°C28°C. Based on the experimental results, which of the following can be concluded about the reaction?

It is an endothermic process, because energy is released by the reaction and is gained by the reaction mixture.

A

It is an endothermic process, because energy is absorbed by the reaction and is lost from the reaction mixture.

B

It is an exothermic process, because energy is released by the reaction and is gained by the reaction mixture.

C

It is an exothermic process, because energy is absorbed by the reaction and is lost from the reaction mixture.

Question

Medina

Chemistry

2 May, 12:43

The chemical reaction between HCl (aq) HCl (aq) and NH3 (aq) NH3 (aq) is represented above. A student combines equimolar amounts of HCl (aq) HCl (aq) and NH3 (aq) NH3 (aq), both solutions initially at 24°C24°C, in a coffee-cup calorimeter. The student observes that the mixture reaches a temperature of 28°C28°C. Based on the experimental results, which of the following can be concluded about the reaction?

It is an endothermic process, because energy is released by the reaction and is gained by the reaction mixture.

A

It is an endothermic process, because energy is absorbed by the reaction and is lost from the reaction mixture.

B

It is an exothermic process, because energy is released by the reaction and is gained by the reaction mixture.

C

It is an exothermic process, because energy is absorbed by the reaction and is lost from the reaction mixture.

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Answers (1)

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Paloma · Answer 1

The answer is: It is an exothermic process, because energy is released by the reaction and is gained by the reaction mixture.

Explanation:

Endothermic (endo means in, inside; thermic refers to temperature) reaction is a type of reaction which needs to absorb the energy in order to take place. The energy in the form of the temperature is lost from the reaction mixture.

Exothermic (exo means out, outside; thermic refers to temperature) reaction is a type of reaction in which the energy in form of the temperature is being released.

Since we know that the temperature rose from 24°C to 28°C, that means that the energy was released making this process exothermic.