How much heat is needed to change the temperature of 3 grams of gold (c = 0.129) from 21°C to 363°C? The answer is expressed to the nearest whole number.

Question

Maeve

Physics

20 July, 06:04

How much heat is needed to change the temperature of 3 grams of gold (c = 0.129) from 21°C to 363°C? The answer is expressed to the nearest whole number.

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Answers (2)

Know the Answer?

Alena Maldonado · Answer 1

Alena Maldonado 20 July, 06:16

0

It's 132 or B on edge 2020

Hensley · Answer 2

Q = mcΔT

Where Q is heat or energy

M is mass, c is heat capacitance and t is temperature

You have to convert Celsius into kelvin in order to use this formula I believe

Celsius + 273 = Kelvin

21 + 273 = 294K

363 + 273 = 636K

Now ...

Q = (0.003) (0.129) (636-294)

Q = 0.132 J if you are using kilograms, in terms of grams which seems more appropriate the answer would be 132J of energy.