Question

38

5 points
A recycling center is melting down gold. It starts out at 18°C and reaches its melting point at 108°C by absorbing 153,000 J of energy. What was the mass o
melted gold? Note: gold has a specific heat of 136 J/kg/°C._kg
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Answer 1

The mass of the melted gold is 100 kg.

Step-by-step explanation:

To determine the mass of the melted gold, we can use the equation: Q = mcΔT, where Q is the heat energy absorbed, m is the mass, c is the specific heat, and ΔT is the change in temperature.

In this case,

Q = 153,000 J,

ΔT = 108°C - 18°C

= 90°C,

c = 136 J/kg/°C.

We can rearrange the equation to solve for m: m = Q / (cΔT).

Substituting the given values, we have

m = 153,000 J / (136 J/kg/°C)(90°C)

= 100 kg.