Thermochemical Equations
What is the enthalpy of reaction for the decomposition of calcium carbonate? CaCO3(s) es001-1.jpg CaO(s) + CO2(g)
656.3
Why do you think knowing enthalpy of reaction might be useful?
It allows scientists to predict the temperature change during a reaction. It allows scientists to determine how much of a reactant is necessary to produce a certain amount of energy. It allows scientists to predict whether a reaction might produce dangerous amounts of heat.
How much energy is released when 0.40 mol C6H6(g) completely reacts with oxygen? 2C6H6(g) + 15O2(g) es001-1.jpg 12CO2(g) + 6H2O(g)
-1,268
What is the enthalpy of reaction for the decomposition of NO2(g)? 2NO2(g) es002-1.jpg N2(g) + 2O2(g)
-67.68
What is the es002-1.jpgHf for this reaction? 16CO2(g) + 18H2O(g) es002-2.jpg 2C8H18(l) + 25O2(g)
10,148
Which of these statements are true? Select all that apply.
1st, 3rd, and 6th options
The enthalpy of combustion for octane (C8H18(l)), a key component of gasoline, is -5,074 kJ/mol. This value is the mc001-1.jpgHrxn for which of the following reactions?
C8H18(l) + 12.5O2(g) mc001-3.jpg 8CO2(g) + 9H2O(g) (option 2)
This reaction is
endothermic
This reaction is
exothermic
