A person makes ice tea by adding ice to 1.8 kg of hot tea, initially at 80°C. How many kilograms of ice, initially at 0°C, are required to bring the mixture to 10°C?

Question

Quizplus · Accepted Answer

To solve this, use the principle of conservation of energy. The heat lost by the tea must equal the heat gained by the ice. Calculate the heat lost by the tea as it cools from 80°C to 10°C and the heat gained by the ice as it melts and warms to 10°C. Solving these equations gives approximately 1.4 kg of ice needed.

A Person Makes Ice Tea by Adding Ice to 1