Chapter 3, Problem 90E

Interpretation Introduction

Interpretation: The following statement is to be explained.

“A $100g$ block of iron metal and of water are each warmed to $75°C$ and placed into two identical insulated containers. Two hours later, the two containers are opened and the temperature of each substance is measured. The iron metal has cooled to $38°C$ while the water has cooled only to $69°C$.”

Concept Introduction:

The relationship between heat and change in temperature used to determine the amount of heat lost is

$q=mC\Delta T$

Here, $q$ is the amount of heat lost, $m$ is mass of the substance, $C$ is heat capacity of the substance, and $\Delta T$ is the change in temperature.