How much energy is released when 20.0 g of water is cooled from 50°C to 30°C (Cwater= 4.18 J/ g*°C)

Chemistry

1 answer:

marissa [1.9K]3 years ago

7 0

Answer:

1672 J

Explanation:

We are supposed to find out the energy released by water when cooled from 50° C to 30°C .

We have the relation that ,

H=msΔT

Information is given that s=4.18 J/ g*°C ,

m=20.0 g,

and ΔT is -20° C.

Hence by substituting we get,

H=-20*20*4.18

(minus symbol represents that energy is being released)

1672 J is release when water is cooled from 50° C to 30°C .

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