Soalan 7:
Diagram 7 shows two hydrocarbon compounds, W and X.
(a) State one element in hydrocarbon compound. [1 mark]
(b) State the name of compound X. [1 mark]
(c) Compare and contrast compounds W and X in terms of the number of carbon atoms and types of bonds. [2 marks]
(d) Food waste that undergoes decaying process will release methane gas. Justify the usage of methane gas produced to generate electrical energy. [2 marks]
Jawapan:
(a) Carbon // Hydrogen
Explanation:
Hydrocarbon compounds are made up entirely of carbon and hydrogen atoms only.
(b) Butene
Explanation:
Hydrocarbon X is butene because it has four carbon atoms in its main chain, contains a double bond between two carbon atom showed it belong to alkene group.
(c)
– Compound W and X has four carbon atoms.
– Compound W has a single covalent bond between all carbon atoms while compound X has one double bond between two carbon atoms.
Explanation:
Both compounds have the same number of carbon atoms, but the different types of bonds.
(d)
– Methane gas produced from food waste is a renewable energy source. It helps reduce dependency on fossil fuels.
– Utilizing food waste to produce methane gas promotes better waste management and reduces the amount of waste sent to landfills.
– The process of generating electricity from methane gas is more efficient compared to directly burning food waste.
Explanation:
The use of methane gas produced from food waste to generate electrical energy is a wise step environmentally and economically, as it promotes the use of renewable energy sources, reduces pollution, and enhances waste management.
Diagram 7 shows two hydrocarbon compounds, W and X.
(a) State one element in hydrocarbon compound. [1 mark]
(b) State the name of compound X. [1 mark]
(c) Compare and contrast compounds W and X in terms of the number of carbon atoms and types of bonds. [2 marks]
(d) Food waste that undergoes decaying process will release methane gas. Justify the usage of methane gas produced to generate electrical energy. [2 marks]
Jawapan:
(a) Carbon // Hydrogen
Explanation:
Hydrocarbon compounds are made up entirely of carbon and hydrogen atoms only.
(b) Butene
Explanation:
Hydrocarbon X is butene because it has four carbon atoms in its main chain, contains a double bond between two carbon atom showed it belong to alkene group.
(c)
– Compound W and X has four carbon atoms.
– Compound W has a single covalent bond between all carbon atoms while compound X has one double bond between two carbon atoms.
Explanation:
Both compounds have the same number of carbon atoms, but the different types of bonds.
(d)
– Methane gas produced from food waste is a renewable energy source. It helps reduce dependency on fossil fuels.
– Utilizing food waste to produce methane gas promotes better waste management and reduces the amount of waste sent to landfills.
– The process of generating electricity from methane gas is more efficient compared to directly burning food waste.
Explanation:
The use of methane gas produced from food waste to generate electrical energy is a wise step environmentally and economically, as it promotes the use of renewable energy sources, reduces pollution, and enhances waste management.