Question

5. The required heat energy to improve the
temperature of 8 grams of ice from - 10°C
to - 5°C is ...
[ ]
2) 40 Cal
3) 80 Cal
4) 120 Cal
1 20 Cal​

Answer 1

Answer:

40

Explanation:

1 one calorie is defined as the the amount of heat required at 1 atmospheric pressure to change the temperature of water 1 degree Celsius

to to change the temperature of 8 gram off ice we need 8 calories

to change the temperature from -10 to -5 so it is a difference of 5 degrees so we must multiply by 5

hence the heat required is 8 × 5 which is 40 calories