What is the final temperature of a sample of water if 12.15j of energy is added to 475g of water at an initial temperature of 20.5°c?

The final temperature of water is 20.5061 °C.

Explanation:

Let the final temperature of water be 'x'.

Given:

Heat added to water is,

Initial temperature of water is,

Mass of water is,

Now, heat  is added to water and its temperature is increased. The temperature is increased because water absorbs all the heat.

Heat absorbed by water is given as:

where 'c' is specific heat capacity of water and its value is equal to 4.186 J/g °C.

Now, plug in the given values and simplify.

Now, from law of conservation of energy, we know that:

Heat absorbed by water = Heat added to water

So, the final temperature of water is 20.5061 °C.