A47.1 g sample of a metal is heated to 99.0°c and then placed in a calorimeter containing 120.0 g of water (c = 4.18 j/g°c) at 21.4°c. the final temperature of the water is 24.5°c. which metal was used?

Answer : The metal used was iron (the specific heat capacity is ).

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

where,

= specific heat of metal = ?

= specific heat of water =

= mass of metal = 47.1 g

= mass of water = 120 g

= final temperature of water =

= initial temperature of metal =

= initial temperature of water =

Now put all the given values in the above formula, we get

Form the value of specific heat of metal, we conclude that the metal used in this was iron.

Therefore, the metal used was iron (the specific heat capacity is ).

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c, liquids evaporate, creating a gas