Question

11. A 25.0-g sample of pure iron at 85 °C is dropped into 75 g of water at 20 °C. What is the final temperature
of the water in the mixture?

Answer 1

A 25.0-g sample of pure iron at 85 °C is dropped into 75 g of water at 20 °C. What is the final temperature

of the water in the mixture

Quantity of water = 75 g

Temperature = 20 ° C

Weight of sample of pure iron = 25.0 g

Temperature = 85° C

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Let the final temperature be T

Heat gained = Heat loss

T = 145 / 4 = 36 . 25 ° C

Final temperature = 36 . 25 ° C

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So the answer is 36.25 ° C = Final Temperature

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Definition of Temperature - Temperature is a degree of hotness and coldness of an object .

S.I unit of temperature is Kelvin .

Temperature is measured with the help of thermometer .