Answer to Question #177352 in General Chemistry for mel

Question

Heat of Naturalization using measurement probes

A. heat capacity of calorimeter:

1. temperature of calorimeter (before mixing) = 25.00 degree Celcius
2. temperature of warm water = 40.00 degree Celcius
3. maximum temperature from curve = 31.00 degree Celcius
4. heat lost by warm water (temp decrease X 5.0g X 4.18 J/K-g) = ?
5. heat gained by cold water (temp increase X 5.0g X 4.18 J/K-g) = ?
6. heat gained by calorimeter (difference between 4. and 5.)
7. heat capacity of calorimeter (heat gained by calorimeter/ temp increase) = ?

find number 4, 5, 6, and 7.

Answer 1

Molar mass of water is 18.02

Heat lost by H2O = $\frac {5}{18.02}×4.18=1.16 kJ$