Chapter 18, Problem 19A

Which will cool a drink faster—a 10-gram ice cube or 10 grams of crushed ice?

To determine

To identify: Whether an ice cube or crushed ice will cool a drink faster.

Answer to Problem 19A

A crushed ice will cool a drink faster.

Explanation of Solution

Introduction:

Heat transfer:

The heat energy is transferred from the surface of any object. It is directly proportional to the surface area through which heat is transferred.

It means the object having higher surface area cools relatively faster than the object with lesser surface area.

Consider 10 g of crushed ice and 10 g of ice cube. The surface area of 10 g crushed ice will be more than a 10 g of ice cube.

Therefore, there will be more area to radiate heat. It means more heat will be transferred from crushed ice to the drink.

Hence, the crushed ice will cool the drink faster.