Do calories and joules measure the same thing? If so what do they measure?

Question

Do calories and joules measure the same thing? If so what do they measure?

Answer 1

yes. They measure energy, heat in particular. the unit Joule is named after scientist Joule. 4.18 J equals one calorie. Amount of heat required to raise the temp of one gm of water from 14,

.55 degrees Celsius to 15.5 degrees Celsius is one calorie

Answer 2

calories, (small 'c'), Calories (Capital 'C') and Joules are all units used in the calculations for the amount of Energy (Heat or Work done), Absorbed or Released.

(1 Calorie (food Energy) is equal to 1,000 calories).

(As a guide, 1 calorie or 4.184 Joules of heat Energy added to or removed from 1.0 gram of Water between 0°C and 100°C, will Increase or Decrease its Temperature by 1°C).

Answer 3

energy

Answer 4

We now know that they measure the same thing: energy. However when the calorie was defined, it was purely in terms of a quantity of heat. It was only after it was established that heat was a form of energy that a more general unit, the Joule, was adopted.

Although they both measure the same thing, it is more usual these days to restrict the use of the calorie to areas where it has historically always been used: e.g. the energy content of foods and the heating potential of fuels.  

Answer 5

A Calorie is defined as the amount of heat enquired to raise the temperature of one kg of water through one degree Celcius.If that amount of heat is supplied electrically then it requires near enough 4180 watt.seconds; which is 4.18 Joules.

Answer 6

Calories is the measurment of energy in food

Joules is a unit of energy

Answer 7

Yes, they are both measures of energy.

Answer 8

As above they both measure energy, just as metres and feet both measure distance.

1 joule is approximately equal to:

6.2415 ×1018 eV (electronvolts)

0.2390 cal (calorie) (small calories, lower case c)

2.3901 ×10−4 kilocalorie, Calories (food energy, upper case C)

9.4782 ×10−4 BTU (British thermal unit)

0.7376 ft·lbf (foot-pound force)