Fuels calculations

Question 1

Ea calc.

Answer 1

max. energy value of peak - initial energy of reactants
(peak - reactants)

Question 2

ΔH calc.

Answer 2

final energy of products - initial energy of reactants
(products - reactants)

Question 3

Balance incomplete combustion (C and CO) of propanol

Answer 3

2C3H5OH(g) + 5O2(g) –> 4CO(g) + 2C(s) + 8H2O(l)

Question 4

energy content from mol of fuel

Answer 4

q = n x ΔH/coeff.

Question 5

electrical calibration calc.

Answer 5

E = V x l x t

Question 6

electrical calibration calc. units (for CF)

Answer 6

J/°C

Question 7

Calibration factor calc.

Answer 7

CF = E/ ΔT

Question 8

chemical calibration calc

Answer 8

E = n(substance) x ΔH

Question 9

chem calibration calc. units (for CF)

Answer 9

kJ/°C

Question 10

Energy using calorimeter

Answer 10

E = CF x ΔT

Question 11

Experimental heat of combustion

Answer 11

energy from fuel / mass of fuel burned

Question 12

Energy content per gram

Answer 12

ΔH/Mr

Question 13

photosynthesis equations

Answer 13

carbon dioxide + water + solar energy –> glucose + oxygen

6CO2(g) + 6H2O(l) + solar energy –> C6H12O6 (aq) + 6O2(g)

Question 14

cellular respiration equations

Answer 14

(NEEDS WATER)
glucose + oxygen –> carbon dioxide + water + chemical energy

C6H12O6(aq) + 6O2(g) –> 6CO2(g) + 6H2O(l) + chemical energy