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Calculate the price of energy ($/GJ) obtained from burning hydrogen, that is a product
of
CH3OH + ΔH0 → CO + H2 ,
and:
methanol density at 20C = 0.791 g/ml,
methanol molecular weight = 32.04 g/mol,
price of 100% methanol = $38/ml.
Assume that methanol thermal decomposition utilizes energy from electricity ($33/GJ)

Sagot :

The calculated answer is 96.7

In the chemical process of combustion, an object quickly combines with oxygen to produce heat. The original substance is referred to as the fuel, and the oxygen's source as the oxidizer. Although it is typically a liquid for airplane propulsion, the fuel can be a solid, liquid, or gas.

In an air-burning flame of pure hydrogen, hydrogen (H2) combines with oxygen (O2) to generate water (H2O), releasing energy in the process. Instead of producing pure oxygen, hydrogen combustion in ambient air can occasionally produce a tiny amount of nitrogen oxides along with the water vapor. Hydrogen can be utilized as a fuel thanks to the energy emitted.

Methanol burns in the following way: CH3OH(l)+ 23O2(g)21CO2(g)+2H2O (l)

G= [G f CO2 (g)+2 G f H2O(l)] reaction

[Gf CH3OH(l)+23Gf O2 (g)]

[−394.36+2(−237.13)]

− [−166.27+0]

=−702.35kJmol−1

How well Gibbs free energy is converted into meaningful labor

= "H reaction," "G reaction," and "100."

= −702.35×100/−726

=96.7

Learn more about combustion here-

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