Standard Science Primary 4 Energy

A cup of hot coffee at 80°C is left on a table in a room at 25°C. What will its temperature be after 5 hours?

A 50°C
B 0°C
C 80°C
D 25°C
Show Worked Solution

Worked Solution

Step 1: Heat flows from the hot coffee to the cooler room. Step 2: The coffee loses heat until it reaches the same temperature as the room. Step 3: This state is called thermal equilibrium.

Correct answer: 25°C

Want more questions like this? Superholic Lab has 10,000+ MOE-aligned questions with full worked solutions.

Start Free Trial — 7 Days Free