1. molar mass glucose is 180 g/mol. 2803 kJ energy released every 180 grams. So for 9.22 g it will be 2803 x (9.22/180) = ? released.
2. The reverse reaction absorbs the same amount; ie. 2803 x (9.22/180) = ?
3 and 4 are done the same way. I'll be happy to check your work if you will post your work, not just the answers.
1. How much heat is released when 9.22 grams of glucose C6H12O6 reacts according to the following equation?
C6H12O6 + 6O2 --> 6CO2 + 6H2O ∆H = -2803 kJ
2. How much heat is absorbed during photosynthesis when 9.22 grams of glucose C6H12O6 is produced?
6CO2 + 6H2O --> C6H12O6 + 6O2 ∆H = +2803 kJ
3. How much heat is released when 147 grams of NO2(g) is dissolved in excess water?
3NO2 + H2O --> 2HNO3 + NO ∆H = - 138 kJ
4. Calculate the heat released when 74.6 grams of SO2 reacts according to the following equation.
2SO2 + O2 --> 2SO3 ∆H = -99.1 k
1 answer
1 answer