Mechanysk ekwivalint fan waarmte - problemen en oplossingen

1. 2 k kal (kilo c kaloaren e ) = ….. c kaloaren e?

Oplossing

1 kcal = 1000 kcal

2 k kal = 2 (1000 k kaloaren e ) = 2000 k kaloaren e

2. 4 C calorie e = ….. c calorie e?

Oplossing

1 Kalorie e ( in haadletter C ) = 1 kcal = 1000 kalorie e

4 C calorie e = 4 (1000 c calorie e ) = 4000 c calorie e

3. 10 c calorie e = ….. Joule?

Oplossing

1 kaloarie e = 4.186 Joule

10 c kaloaren e = 10 (4.186 Joules) = 41.86 Joules

[irp]

4. 5 kcal = ….. Joule?

Oplossing

1 k cal = 1000 c alorie = 4186 Joule

5 kcal = 5 (4186 Joules) = 20930 Joules

5. 2000 Joule = ….. kcal?

Oplossing

4186 Joule = 1 kcal

8372 Joule = 8372 / 4186 = 2 kcal

2000 Joule = 2000 / 4186 = 0.4777 kcal

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