Question

2.49 The heat of combustion of ethane (Cile) is -- 337.0 kcal at 25°C. The heat of th
reaction when 3g of cthane is burnt completely is
A)-3.37 kcal
C) +3.37 kcal
B) -33.7 kcal
D) 33.7 kcal
50 The standard enthalpy changes of formation of carbon dioxide and water are -3
Kimo' and -286kJ mol' respectively, if the standard enthalpy change
combustion of propyne, CH. is -1938 KJ mol!. What is its standard enthal
change of formation?
A) +1258 kJ mol
C) +180 kJ mol
B) -184 kJ mol!
D) -680 kJ moll​

Answer 1

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