If 100g of water loses 3000 j of energy, what is the temperature change ?

The temperature change is 7.2 °C

Explanation:

Let the temperature change be given by 'x'.

Given:

Mass of water is,

Heat lost by water is,

Specific heat capacity of water is,

We know that, heat energy lost by 'm' g of water for a temperature change of 'x' °C is given as:

Rewriting the above in terms of 'x', we have

Plug in 100 for 'm, 4.186 for 'c', 3000 for 'Q' and solve for 'x'. This gives,

Therefore, the temperature change is 7.2 °C.

c is the answer because when something is left after something evaporates that shows the chemical change.

the objects have the same charge is correct.

nathan lee