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Homework Help: Temperature-dependent entropy

  1. Feb 1, 2017 #1
    1. The problem statement, all variables and given/known data
    As you know it's finals time and I desperatly need help with one physics task (it's not my main subject, but I still have to pass it -.-). Here it is: According to data below count temperature-depended entropy and entropy itself for reaction: CH4 + 2 O2 = CO2 + 2 H2O CH4: ΔS=186,2 [J/Kmol], Cp=14,15+75,5∙10-3 T-180,0∙10-7 T2 [J/Kmol] O2: ΔS= 205,6 [J/Kmol], Cp=25,72+12,98∙10-3 T-38,6∙10-7T2 [J/Kmol] CO2: ΔS=213,6 [J/Kmol], Cp=26,0+43,5∙10-3 T-148,3∙10-7 T2 [J/Kmol] H2O: 188,7 [J/Kmol], Cp=30,36+9,61∙10-3T+11,8∙10-7 T2 All reagents are gases, and the given values are for 298K.
  2. jcsd
  3. Feb 4, 2017 #2


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    How does entropy vary with temperature?
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