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The heat of combustion of graphite and carbon monoxide respectively are -393.5 kJ mol⁻1 and -283 kJ mol⁻1. Thus, heat of formation of carbon monoxide in kJ mol⁻1 is
- a)+ 172.5
- b)- 110.5
- c)- 10760
- d)- 676.5
Correct answer is option 'B'. Can you explain this answer?
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The heat of combustion of graphite and carbon monoxide respectively ar...
Heat of Combustion and Heat of Formation
The heat of combustion and heat of formation are important thermodynamic quantities that help us understand the energy changes associated with chemical reactions. Let's understand these terms and their relationship to the given question.
Heat of Combustion:
The heat of combustion (ΔHc) is the heat released when one mole of a substance is completely burned in excess oxygen. It represents the energy content of the substance. In this case, the heat of combustion of graphite is -393.5 kJ mol^-1, which means that 393.5 kJ of energy is released when one mole of graphite is burned.
Heat of Formation:
The heat of formation (ΔHf) is the heat change when one mole of a compound is formed from its constituent elements in their standard states. It represents the energy required to form the compound. In this case, we need to determine the heat of formation of carbon monoxide (CO).
Using Hess's Law:
Hess's Law states that the heat change of a reaction is independent of the pathway taken. We can use this principle to relate the heat of combustion of graphite and the heat of formation of carbon monoxide.
The balanced equation for the combustion of graphite is:
C(gr) + O2(g) → CO2(g)
The balanced equation for the formation of carbon monoxide is:
C(gr) + 1/2 O2(g) → CO(g)
To obtain the heat of formation of carbon monoxide, we can subtract the heat of combustion of graphite from the heat of combustion of carbon monoxide.
ΔHf(CO) = ΔHc(CO) - ΔHc(graphite)
ΔHf(CO) = -283 kJ mol^-1 - (-393.5 kJ mol^-1)
ΔHf(CO) = -283 kJ mol^-1 + 393.5 kJ mol^-1
ΔHf(CO) = 110.5 kJ mol^-1
Therefore, the heat of formation of carbon monoxide is 110.5 kJ mol^-1.
The heat of combustion and heat of formation are important thermodynamic quantities that help us understand the energy changes associated with chemical reactions. Let's understand these terms and their relationship to the given question.
Heat of Combustion:
The heat of combustion (ΔHc) is the heat released when one mole of a substance is completely burned in excess oxygen. It represents the energy content of the substance. In this case, the heat of combustion of graphite is -393.5 kJ mol^-1, which means that 393.5 kJ of energy is released when one mole of graphite is burned.
Heat of Formation:
The heat of formation (ΔHf) is the heat change when one mole of a compound is formed from its constituent elements in their standard states. It represents the energy required to form the compound. In this case, we need to determine the heat of formation of carbon monoxide (CO).
Using Hess's Law:
Hess's Law states that the heat change of a reaction is independent of the pathway taken. We can use this principle to relate the heat of combustion of graphite and the heat of formation of carbon monoxide.
The balanced equation for the combustion of graphite is:
C(gr) + O2(g) → CO2(g)
The balanced equation for the formation of carbon monoxide is:
C(gr) + 1/2 O2(g) → CO(g)
To obtain the heat of formation of carbon monoxide, we can subtract the heat of combustion of graphite from the heat of combustion of carbon monoxide.
ΔHf(CO) = ΔHc(CO) - ΔHc(graphite)
ΔHf(CO) = -283 kJ mol^-1 - (-393.5 kJ mol^-1)
ΔHf(CO) = -283 kJ mol^-1 + 393.5 kJ mol^-1
ΔHf(CO) = 110.5 kJ mol^-1
Therefore, the heat of formation of carbon monoxide is 110.5 kJ mol^-1.
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The heat of combustion of graphite and carbon monoxide respectively are -393.5 kJ mol⁻1 and -283 kJ mol⁻1. Thus, heat of formation of carbon monoxide in kJ mol⁻1 isa)+ 172.5b)- 110.5c)- 10760d)- 676.5Correct answer is option 'B'. Can you explain this answer?
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The heat of combustion of graphite and carbon monoxide respectively are -393.5 kJ mol⁻1 and -283 kJ mol⁻1. Thus, heat of formation of carbon monoxide in kJ mol⁻1 isa)+ 172.5b)- 110.5c)- 10760d)- 676.5Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The heat of combustion of graphite and carbon monoxide respectively are -393.5 kJ mol⁻1 and -283 kJ mol⁻1. Thus, heat of formation of carbon monoxide in kJ mol⁻1 isa)+ 172.5b)- 110.5c)- 10760d)- 676.5Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The heat of combustion of graphite and carbon monoxide respectively are -393.5 kJ mol⁻1 and -283 kJ mol⁻1. Thus, heat of formation of carbon monoxide in kJ mol⁻1 isa)+ 172.5b)- 110.5c)- 10760d)- 676.5Correct answer is option 'B'. Can you explain this answer?.
Solutions for The heat of combustion of graphite and carbon monoxide respectively are -393.5 kJ mol⁻1 and -283 kJ mol⁻1. Thus, heat of formation of carbon monoxide in kJ mol⁻1 isa)+ 172.5b)- 110.5c)- 10760d)- 676.5Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for JEE.
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