Thermodynamics

What you'll learn

1. 1

   Imagine a steaming cup of tea ☕ — the heat moves from the tea into the cold air around it.

2. 2

   Which way does heat naturally flow?

3. 3

   Move the slider to see how fast the tea cools down as heat leaves it.

4. 4

   Let's calculate the heat energy lost when 200 g of water cools from 80°C to 30°C.

5. 5

   Now try it yourself: 100 g of water cools from 60°C to 20°C. How much heat is lost?

6. 6

   What is the temperature change if water cools from 60°C to 20°C?

7. 7

   If the heat lost is 16 720 J for 100 g of water cooling 40°C, was your calculation correct?