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chem mcq urgent plz help
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post the link please
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Please post your Chemistry problems in the chemistry thread.
Waisay, the answer is A. Have a look at the following energy level diagram:
1 is correct as apparent from above. (the enthalpy change of atomisation of diamond is smaller)
2 is correct: Bond energy of carbon-carbon bonds in graphite is larger as more energy is required to break the bond to form atoms (same as 1).
3 is correct: Combustion is an exothermic reaction, the products of which are CO2 and H20 for both diamond and graphite. The diagram shows that the enthalpy change of combustion of diamond is greater.
Waisay, the answer is A. Have a look at the following energy level diagram:
1 is correct as apparent from above. (the enthalpy change of atomisation of diamond is smaller)
2 is correct: Bond energy of carbon-carbon bonds in graphite is larger as more energy is required to break the bond to form atoms (same as 1).
3 is correct: Combustion is an exothermic reaction, the products of which are CO2 and H20 for both diamond and graphite. The diagram shows that the enthalpy change of combustion of diamond is greater.
