Question

8) Granite has a specific heat of 800.00J/gºC. What mass of granite is needed to store 150,000.00J
of heat if the temperature of the granite is to be increased by 15.5°C?



Need answer ASAP

Answer 1

Answer:

Explanation:

specific heat of granite  S = 800 J /g°C

increase in temperature = 15.5 °C .

mass  = m ( let )

Heat needed to raise temp  = mass x specific heat x rise in temperature

150,000 = m x 800 x 15.5

m = 12.096 g .

Answer 2

The mass of granite that is needed to store 150,000.00J of heat if the temperature of the granite is to be increased by 15.5°C is 12.1grams.

How to calculate mass of a substance?

The mass of a substance can be calculated using the following expression:

Q = m × c × ∆T

Where;

• Q = quantity of heat absorbed or released
• m = mass of substance
• c = specific heat capacity
• ∆T = change in temperature

m = Q ÷ c∆T

m = 150,000 ÷ 800 × 15.5

m = 150,000 ÷ 12400

m = 12.1grams

Therefore, the mass of granite that is needed to store 150,000.00J of heat if the temperature of the granite is to be increased by 15.5°C is 12.1grams.

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