http://www.ck12.org Chapter 17. Thermochemistry
- Calculate the total amount of heat (in kJ) absorbed by the process of converting 4.33 g of ice at−60.0°C to
steam at 185°C. - An ice cube at 0°C was dropped into a foam cup containing 100. g of water at 40.0°C. The final temperature
of the water in the cup is 21.2°C. Assuming no heat loss, what was the mass of the ice cube? - The molar heat of solution of NaCl is 3.88 kJ/mol. 125 g of NaCl is dissolved in 500. g of water at 20.0°C
in a calorimeter. What is the temperature of the solution when the salt has completely dissolved? Assume the
specific heat of the solution is the same as that of water.
Further Reading / Supplemental Links
- HeatofFusionandHeatofVaporization, http://www.wisc-online.com/Objects/ViewObject.aspx?ID=GCH460
4 - HeatofFusionofWater, http://www.kentchemistry.com/links/Energy/HeatFusion.htm
- HeatofVaporizationofWater, http://www.kentchemistry.com/links/Energy/HeatVaporization.htm
- ComplexCalorimetryProblems, http://www.kentchemistry.com/links/Energy/ComplexCalProblems.htm
Points to Consider
A formation reaction is a reaction in which elements in their standard states are combined to form a compound.
- How can knowledge of heats of formation be used to determine the enthalpy change for any reaction?
- What does it mean to say that heats of reaction are additive?