Chapter 17, Problem 54A

Interpretation Introduction

Interpretation: The basic concept of calorimetry is to be discussed.

Concept Introduction:

Calorimetry is a phenomenon used to measure the amount of heat involved in a chemical or physical reaction. The heat change during a chemical reaction leads to a change in temperature which is used to measure the enthalpy.

Answer to Problem 54A

The basic concept of calorimetry is that it follows the law of conservation of energy where the heat absorbed by the cold substance is equal in magnitude to the heat released by the hot substance.

Explanation of Solution

If heat is absorbed during the reaction, then heat is transferred from the calorimeter to the system, and the temperature of the calorimeter decreases. Similarly, if the reaction releases heat, then heat is transferred from the system to the calorimeter, and the temperature of the calorimeter increases. The amount of heat transfer is calculated by using mass, specific heat, and the temperature change.