Photo AI

Hydrogen, H2, fuel cells and H2-powered combustion engines can both be used to power cars - VCE - SSCE Chemistry - Question 13 - 2020 - Paper 1

Question icon

Question 13

Hydrogen,-H2,-fuel-cells-and-H2-powered-combustion-engines-can-both-be-used-to-power-cars-VCE-SSCE Chemistry-Question 13-2020-Paper 1.png

Hydrogen, H2, fuel cells and H2-powered combustion engines can both be used to power cars. Three statements about H2 fuel cells and H2-powered combustion engines are... show full transcript

Worked Solution & Example Answer:Hydrogen, H2, fuel cells and H2-powered combustion engines can both be used to power cars - VCE - SSCE Chemistry - Question 13 - 2020 - Paper 1

Step 1

1. Neither H2 fuel cells nor H2-powered combustion engines produce greenhouse gases.

96%

114 rated

Answer

This statement is correct, as hydrogen fuel cells convert hydrogen into electricity through a chemical reaction, producing only water as a by-product. H2 combustion engines also predominantly emit water vapor when hydrogen is burned.

Step 2

2. Less H2 is required per kilometre travelled when using an H2-powered combustion engine than when using H2 fuel cells.

99%

104 rated

Answer

This statement is incorrect. Fuel cells are generally more efficient than combustion engines, meaning they require less hydrogen to travel the same distance.

Step 3

3. More heat per kilogram of H2 is generated in an H2-powered combustion engine than in H2 fuel cells.

96%

101 rated

Answer

This statement is correct. H2 combustion engines typically convert a larger portion of the energy contained in hydrogen into heat, while fuel cells operate at a higher efficiency in converting chemical energy to electrical energy.

Join the SSCE students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

;