Copper metal has a specific heat of 0.385 J/ g° C and has melting point of 1083°C. Calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0 ° C to 875 ° C .

Question

Copper metal has a specific heat of 0.385 J/ g° C and has melting point of 1083°C. Calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0 ° C to 875 ° C . (A) 1.97× 10- 5J (B) 1.0× 10- 2J (C) 329 J (D) 7.50 kJ

Tardigrade Admin · Accepted Answer

Q = mC. (Δ T ) So Q =22.8 g × 0.385 Jg -1 ° C -1 ×(875° C -20° C ) =22.8 × 0.385 × 855 J =7.50 × 103 J =7.50 kJ .

Q. Copper metal has a specific heat of 0.385 J/ $g^{\circ} C$ and has melting point of 1083°C. Calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0 $^{\circ} C$ to 875 $^{\circ} C$ .

$1.97 \times 1 0^{- 5} J$

$1.0 \times 1 0^{- 2} J$

329 J

7.50 kJ

$Q = m C . (Δ T)$

So $Q = 22.8 g \times 0.385 J g^{- 1}^{\circ} C^{- 1} \times (87 5^{\circ} C - 2 0^{\circ} C)$

$= 22.8 \times 0.385 \times 855 J = 7.50 \times 1 0^{3} J$

$= 7.50 k J .$

Q. Copper metal has a specific heat of 0.385 J/ g∘C and has melting point of 1083°C. Calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0 ∘C to 875 ∘C .

1.97×10−5J

1.0×10−2J