# 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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- Converting temperature scales
- Linear expansion
- Area expansion
- Volume expansion
- Heat
- Mechanical equivalent of heat
- Specific heat and heat capacity
- Latent heat, the heat of fusion, the heat of vaporization
- Energy conservation for heat transfer