Question 1
Calculate the enthalpy of solution for the dissolution of sodium chloride, NaCl, molar mass = 58.443 g mol
-1. When 6.93 g of NaCl is dissolved in a coffee cup calorimeter containing 100.0 mL of water the temperature dropped from 23.5 °C to 22.4 °C. The specific heat of water is 4.184 J g
-1 °C
-1, and assume the density of the solution is 1.00 g mL
-1.
◦ 4.1 kJ mol
-1◦ 3.9 kJ mol
-1◦ -6.4 kJ mol
-1◦ 6.3 kJ mol
-1◦ -2.8 kJ mol
-1Question 2
Calculate the enthalpy of solution for the dissolution of lithium iodide, LiI, molar mass = 133.85 g mol
-1. When 1.49 g of LiI is dissolved in a coffee cup calorimeter containing 75.0 mL of water the temperature increased from 23.5 °C to 25.7 °C. The specific heat of water is 4.184 J g
-1 °C
-1, and assume the density of the solution is 1.00 g mL
-1.
◦ -62 kJ mol
-1◦ -76 kJ mol
-1◦ 3
0 kJ mol
-1◦ 18 kJ mol
-1◦ -39 kJ mol
-1
The Mass of Impacts on Earth
How to calculate present value (Question 2)
How to calculate simple interest (Part 1)
with solution
An empty spice bottle has an inner volume of 1.31 10-4 m3 . It has a mass of 112 g when filled ...
Cross-section of a human molar