Heat Capacity: Difference between revisions

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==Main Idea==


===Mathematical Model===
===Computational Model===
==Examples==
===Simple===
===Middling===
===Difficult===
==Connectedness==
==History==
==See also==
===Further reading===
===External links===
==References==
==Heat Capacity==
The concept of Heat Capacity is integral to understanding how the temperature of a substance rises and falls. Heat Capacity is the ratio of energy added or removed from a substance to the temperature change observed in that substance. Typically, heat capacities are expressed in terms of the amount of heat (kJ, J, or kCal) that needs to be added to raise the temperature of a substance by 1 degree (Celsius, Fahrenheit, Kelvin). Typical units of Heat Capacities are J/g, kJ/kg, and BTU/lb-mass. The SI unit of heat capacity is J/g.
==Calculating/Estimating Heat Capacities==
===Kopp's Rule===
==Applications==
===Examples===
Problem: You have a burner that emits 15,000 J of heat in the period that it is left on. Will this burner be able to raise 2 kg of water from 50 °C to 52 °C? The specific heat capacity of water is 4,186 J/kg °C.
Solution: Use Q=mCΔT. The amount of heat needed to do the process specified in the question is Q=(2 kg)*(4,186 J/kg °C)*(2 °C)=16,744 J. Since the burner only gives of 15,000 J, the water will not reach the desired temperature.
Problem: What is the specific heat of 3 g substance that takes 100 J to raise 3 degrees.
Solution: Use Q=mCΔT. Q=100 J, m= 3 g, ΔT=3 °C. 100J= (3 g)*(C)*(3 °C). C=11.11111 J/g °C.
==History==
== See also ==
*[[Specific Heat]]
*[[Thermal Energy]]
===Further reading===
Elementary Principles of Chemical Processes (3rd Edition) By: Richard M. Felder & Ronald M. Rousseau
Encyclopædia Britannica, 2015, "Heat capacity"
==References==
*http://chemwiki.ucdavis.edu/Physical_Chemistry/Thermodynamics/Calorimetry/Heat_Capacity
*http://www.chm.davidson.edu/vce/calorimetry/heatcapacity.html
*http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html
[[Category:Properties of Matter]]

Latest revision as of 16:56, 31 July 2019