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How much heat energy must be added to increase the temperature of 2 grams of water if the water’s temperature is raised from 10°C to 15°C and there is a heat capacity of 10 J/g°C ?

[a] 250 J
[b] 200 J
[c] 300 J
[d] 100 J

1 Answer

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Final answer:

The amount of heat energy required to raise the temperature of 2 grams of water from 10°C to 15°C with a heat capacity of 10 J/g°C is calculated using the formula q = m × c × ΔT, giving a result of 100 J.

Step-by-step explanation:

The question asks about the amount of heat energy required to raise the temperature of 2 grams of water from 10°C to 15°C, given a heat capacity of 10 J/g°C. To calculate the heat energy (q), you use the formula q = m × c × ΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature. Plugging in the given values:

q = 2 g × 10 J/g°C × (15°C - 10°C)

q = 2 g × 10 J/g°C × 5°C

q = 100 J

Therefore, the correct answer is [d] 100 J. This is the amount of heat energy added to increase the temperature of 2 grams of water by 5°C.

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