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23 May, 04:58

When 5.000 g of NaHCO3 is added to 600.0 g of water in a 'coffee cup calorimeter', the temperature decreases from 22.35°C to 18.94°C.

a) Calculate qcalorimeter, in joules, assuming the specific heat capacity of the solution is the same as pure water: 4.186 Jg-1K-1.

Report your value to 4 significant figures, and do not include units in your answer.

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  1. 23 May, 06:12
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    Answer is: qcalorimeter is 8635.9273 J.

    ΔT = 22.35°C - 18.94°C.

    ΔT = 3.41°C = 3.41 K; temperature change.

    m (H₂O) = 600.0 g; mass of water.

    mr = 605.0; mass of solution.

    cp = 4.186 J/g·K, specific heat capacity of the solution.

    qcal = mr · ΔT· cp.

    qcal = 605 g · 3.41 K · 4.186 J/g·K.

    qcal = 8635.9273 J; amount of heat absorbed.
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