Question

How many joules are in 104 calories? (1 cal = 4.18 J)?

Answer 1

Hint: The energy required to raise the temperature of the one gram of water by 1 $^{o}C$ is called calorie.
The other unit which is used to express the energy is joule. The relation between the joules and the calories is as follows.
1 calorie = 4.18 joules

Complete step-by-step answer:- In the question it is asked how many joules are in 104 calories and has given 1 cal = 4.18 J.
- We should know the relation between joules and calories to calculate the number of joules for 104 calories.
- The relation between the joules and the calories is as follows.
1 calorie = 4.18 joules
- Now by substituting the value of one calorie value in 104 calories we will get the number of joules in 104 calories.
104 calories = (104) (4.18) = 434.72 joules.
- Therefore the number of joules for 104 calories is 434.72 joules.
- Joules are different from calories, both are not the same.
- Calorie is going to vary with temperature.
- The ISO defined to measure energy is calorie and this is equal to 4.18 4 joules.

Note: Don’t be confused between the units of calories with the units which are printed on the food items. The unit which is printed on the food items is Calorie or Kilocalories are different from the calorie that we discussed in the above discussion.