Question

What is the amount of heat to be removed from 2 tons of apples when cooled from 25°C to 5°C? Specific heat of apple is 0.1 kcal/kg°C.

• A. 4000 kcal
• B. 1000 kcal
• C. 2000 kcal
• D. 40,000 kcal

Hint:

Use Q = mass x specific heat x temperature drop, after converting tons to kilograms.

Answer 1

The Correct Option is A

Set up the sensible heat equation directly in consistent units.

\[Q = m \times c \times \Delta T\]

Here \(m = 2 \text{ tons} = 2000 \text{ kg}\), \(c = 0.1 \text{ kcal/kg}^\circ C\), and \(\Delta T = 25 - 5 = 20^\circ C\).

\[Q = 2000 \times 0.1 \times 20\]

\[Q = 200 \times 20 = 4000 \text{ kcal}\]

\[\boxed{Q = 4000 \text{ kcal}}\]