The specific heat of solid gold is 0.13 J/g • °C.How much heat is needed to raise the temperature of 25.0 g of gold from 23°C to its melting point at 1063°C?

Question

Quizplus · Accepted Answer

First, we need to find the change in temperature:

ΔT = (final temperature) - (initial temperature) 
ΔT = 1063°C - 23°C 
ΔT = 1040°C

Next, we can use the formula Q = mcΔT, where Q is heat, m is mass, c is specific heat, and ΔT is change in temperature. Plugging in the values:

Q = (25.0 g)(0.13 J/g°C)(1040°C) 
Q = 338 kJ

But we need the answer in units of kJ, not J, so we divide by 1000:

Q = 338 kJ ÷ 1000 
Q = 0.338 kJ

So the answer is B, 3.4 kJ.

The Specific Heat of Solid Gold Is 0