The heat of fusion for silver at 960.8$^{\circ}$C is 88.3 kJ/kg and the specific heat of silver is 0.235 kJ/kg$^{\circ}$C.What is the energy needed to melt 100 grams of silver starting at 0$^{\circ}$C?

Question

Quizplus · Accepted Answer

To calculate the energy needed to melt 100 grams of silver starting at 0C, we need to use the formula:

Energy = (mass of silver) x (heat of fusion) + (mass of silver) x (specific heat) x (change in temperature)

First, let's calculate the energy needed to melt the silver:

Energy = (0.1 kg) x (88.3 kJ/kg) = 8.83 kJ

Next, let's calculate the energy needed to raise the temperature of the silver from 0C to its melting point of 960.8F1F1F1S1F1F1F10C:

Energy = (0.1 kg) x (0.235 kJ/kg F1F1F1S1F1F1F10C) x (960.8F1F1F1S1F1F1F10C) = 22.6 kJ

Finally, we can add the two energies together to get the total energy needed:

Total energy = 8.83 kJ + 22.6 kJ = 31.4 kJ

Therefore, the answer is B) 31.4 kJ.

The Heat of Fusion for Silver at 960 ∘^{\circ}∘ C Is 883 KJ/kg and the Specific Heat of Silver Is 0

The Heat of Fusion for Silver at 960 $^{\circ}$ C Is 883 KJ/kg and the Specific Heat of Silver Is 0