Energetics and thermochemistry

What you'll learn

1. 1

   Imagine holding a hot cup of tea 🍵. The heat moves from the cup to your hands — that's energy being transferred!

2. 2

   When you hold a hot cup, does heat move from the cup to your hands or from your hands to the cup?

3. 3

   Drag the thermometer to show the temperature change when a hot cup cools from 80°C to 60°C.

4. 4

   Let's calculate the heat released when 50 g of water cools from 80°C to 60°C.

5. 5

   What is ΔT when a substance goes from 25°C to 50°C?

6. 6

   Now try it yourself: 100 g of water cools from 90°C to 70°C. How much heat is released?

7. 7

   Calculate: 100 g water, 90°C to 70°C. What is q in J?