Mechanical equivalent of heat – problems and solutions

1. 2 kcal (kilocalorie) = ….. calorie ?

Solution

1 kcal = 1000 calorie

2 kcal = 2 (1000 calorie) = 2000 calorie

2. 4 Calorie = ….. calorie ?

Solution

1 Calorie (a Capital C) = 1 kcal = 1000 calorie

4 Calorie = 4 (1000 calorie) = 4000 calorie

3. 10 calorie = ….. Joule ?

Solution

1 calorie = 4.186 Joule

10 calorie = 10 (4.186 Joule) = 41.86 Joule

4. 5 kcal = ….. Joule ?

Solution

1 kcal = 1000 calorie = 4186 Joule

5 kcal = 5 (4186 Joule) = 20930 Joule

5. 2000 Joule = ….. kcal ?

Solution

4186 Joule = 1 kcal

8372 Joule = 8372 / 4186 = 2 kcal

2000 Joule = 2000 / 4186 = 0.4777 kcal

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1. Converting temperature scales
2. Linear expansion
3. Area expansion
4. Volume expansion
5. Heat
6. Mechanical equivalent of heat
7. Specific heat and heat capacity
8. Latent heat, the heat of fusion, the heat of vaporization
9. Energy conservation for heat transfer