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.

Question

Sonny Rhodes

Chemistry

28 March, 19:42

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.

+1

Answers (1)

Know the Answer?

Rebekah Stanley · Answer 1

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.