Question 71
Does each statement describe a physical or chemical change? Is each change exothermic or endothermic? Write your answers in the table.
| Statement | Physical or chemical change? | Exothermic or endothermic? |
|---|---|---|
| Ameera mixed water and calcium chloride in a beaker. The temperature in the beaker changed from 23°C to 50°C. | | |
| Jacob mixed baking soda with hydrochloric acid. The mixture bubbled and its temperature changed from 52°C to 22°C. | | |
| Ahmed lit a candle. | | |
| Mrs Lee’s wet laundry dried in the Sun. | | |
| Kai baked a cake in the oven. | | |
| Statement | Physical or chemical change? | Exothermic or endothermic? |
|---|---|---|
| Ameera mixed water and calcium chloride in a beaker. The temperature in the beaker changed from 23°C to 50°C. | | |
| Jacob mixed baking soda with hydrochloric acid. The mixture bubbled and its temperature changed from 52°C to 22°C. | | |
| Ahmed lit a candle. | | |
| Mrs Lee’s wet laundry dried in the Sun. | | |
| Kai baked a cake in the oven. | | |
