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General Chemistry

1.) Use the values of ∆Hof given below to calculate (in kJ) ∆Horxn for the following reaction:

C2H5OH (l)+ 3O2(g) → 2CO2(g) + 3H2O(g)
Given: ∆Hof (kJ/mol)
C2H5OH (l) -278
O2(g) 0
CO2(g) -394
H2O(g) -242

2.) The graph below shows the heating curve of water. Use this graph to answer the following question.
How much heat (q) is required to heat 16 g of ice at -13.0oC (Celsius) to 16 g of water at 65.0oC?
spec. heat of H2O = 4.184 J/goC
spec. heat of ice = 2.087 J/goC
Heat of Fusion = 6.02 kJ/mol
1 mol of water = 18.0g


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