30.0 g of copper pellets are removed from a 300?Coven and immediately dropped in

Question

30.0 g of copper pellets are removed from a 300?Coven and immediately dropped into 120 mL of water at 20.0 ?C in an

insulated cup.

You may want to review (Pages 530 - 531) .

Part A

What will the new water temperature be?

Express your answer with the appropriate units.

30.0 g of copper pellets are removed from a 300?Coven and immediately dropped into 120 mL of water at 20.0 ?C in an

insulated cup.

You may want to review (Pages 530 - 531) .

Part A

What will the new water temperature be?

Express your answer with the appropriate units.

Explanation / Answer

here,

mass of copper , m1 = 30 g = 0.03 kg

mass of water , m = 120 mL = 120 g = 0.12 kg

let the new temprature be T

using conservation of heat energy

m1 * Cw * ( T - 20) = m2 * Cc * ( 300 - T)

0.12 * 4186 * ( T - 20) = 0.03 *385 * ( 300 - T)

solving for T

T = 26.3 degree C

the new temprature is 26.3 degree C

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