If a 2.0g sample of water at 5.0celcius absorbs 21.8Joules of energy, the temprature of the sample will be raised by

Question

Chemistry

Rylan Cervantes

2 May, 02:18

If a 2.0g sample of water at 5.0celcius absorbs 21.8Joules of energy, the temprature of the sample will be raised by

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Landen Hutchinson · Answer 1

You'd use the temperature change equation. The specific heat of water is always 4.18J / (g °C).

Equation to use: q=mCΔT

21.8 = (2.0) (4.18) (Tf-5)

21.8 = (8.36) (Tf-5)

21.8/8.36=Tf-5

2.61=Tf-5

2.61+5=Tf

Tf=7.61 °C

Since you want to know how many °C it raises, you wouldn't pay attention to the last 2 steps, however if you need to know the final temp, you want to go to the last step.