Energy from fuels

Energy can also be produced by a hydrogen-oxygen fuel cell with an acidic electrolyte. (i) Deduce the half-equations for the electrode reactions in this fuel cell. (ii) Hydrogen produces a line emission spectrum with several lines in the visible region.…

What is the sum of the coefficients when this equation is balanced with the smallest whole numbers? $\ce{\_CH3CH(CH3)CH2CH2CH3 + \_O2 -> \_CO2 + \_H2O}$ A. 20 B. 37 C. 47 D. 53

(i) State the equation for the formation of glucose by photosynthesis. (ii) Outline two advantages of using biobutanol rather than petrol (gasoline) as a fuel for vehicles.

What is the coefficient of oxygen when the equation for the complete combustion of butan-1-ol is balanced using the smallest whole numbers? The unbalanced equation is $\ce{C4H9OH + O2 -> CO2 + H2O}$. A. 4 B. 6 C. 7 D. 13

A direct formic acid fuel cell generates electricity by oxidizing formic acid, $\ce{HCOOH}$, with oxygen at the two electrodes, shown below as separate half-equations. Anode: $\ce{HCOOH(aq) -> CO2(g) + 2H+(aq) + 2e-}$ Cathode:…

Which statement best describes an environmental consequence of using fossil fuels? A. The carbon dioxide released is completely absorbed by the oceans, so its concentration in the atmosphere does not change. B. Coal has a higher hydrogen to carbon ratio than…

Write an equation for the complete combustion of $\ce{C19H40}$.

Explain why a fuel produced from recently grown plants (a biofuel) contributes less to climate change than a fossil fuel.

Which energy source is renewable? A. natural gas B. biodiesel made from vegetable oil C. petrol (gasoline) refined from crude oil D. uranium