# How much heat is needed to raise the temperature of 25 g of a substance by 15°C when the specific heat is .92 J/g-°C?

It will require

Use the following equation:

where:

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Solution

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To calculate the amount of heat needed to raise the temperature of a substance, you can use the formula:

Q = m * c * ΔT

Where: Q = heat energy (in joules) m = mass of the substance (in grams) c = specific heat capacity of the substance (in J/g°C) ΔT = change in temperature (in °C)

Given: m = 25 g c = 0.92 J/g°C ΔT = 15°C

Substitute the values into the formula:

Q = 25 g * 0.92 J/g°C * 15°C

Q = 345 joules

So, 345 joules of heat is needed to raise the temperature of 25 g of the substance by 15°C.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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