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How much heat is needed to raise 26 g of iron from 25°C to 45°C?

Answer 1

Wyatt Atkins

We need some extra data.........

You need to quote the specific heat of iron....

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Answer 2

Caleb Adams

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

Q = mcΔT

Where: Q = heat (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)

For iron, the specific heat capacity is approximately 0.45 J/g°C.

Given: m = 26 g ΔT = (45°C - 25°C) = 20°C

Plug the values into the formula:

Q = (26 g) * (0.45 J/g°C) * (20°C) Q = 234 J

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Answer from HIX Tutor

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.