# DEfine One Joule in terms of Heat energy..viz..ONE JOULE is the HEAT ___ by body of mass__to raise it temp by ___

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Heat is one of the many forms of energy and it is measured in Joules.

If you want to measure the amount of heat needed to heat an object, you could use the followings as refference: 1 gram of water is heated to 1 Celsius degree. The amount of heat needed is of 4.2 Joules.

If you want to determine how many Joules are needed to heat 1 kg of water to 10 Celsius degrees, you'll have to use the rule of three.

1g water........1C degree...............4.2 Joules

1000 g...........10C degrees.............x Joules

We also know that 4.2 Joules are equivalent to one calorie.

If you want to determine how many Joules are needed to transform the mass of a substance from a liquid to a gas, you'll have to use the formula:

Q = mCdeltaT

m - themass of the substance

C- the specific heat of the substance

delta T - the change in temperature (T final-Tinitial)