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Ethylene on combustion gives carbon diox...

Ethylene on combustion gives carbon dioxide and water. Its heat of combustion is `1410.0 kJ mol^(-1)`. If the heat of formation of `CO_(2)` and `H_(2)O` are `393.3 kJ` and `286.2 kJ`, respectively. Calculate the heat of formation of ethylene.

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To calculate the heat of formation of ethylene (C₂H₄) from the given data, we can use Hess's law, which states that the total enthalpy change for a reaction is the sum of the enthalpy changes for the individual steps of the reaction. ### Step-by-Step Solution: 1. **Write the combustion reaction of ethylene:** The combustion of ethylene can be represented as: \[ \text{C}_2\text{H}_4(g) + 3\text{O}_2(g) \rightarrow 2\text{CO}_2(g) + 2\text{H}_2\text{O}(l) ...
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Knowledge Check

  • The heats of combustion for C, H_(2) and CH_(4) are -349, -241.8 and -906.7 kJ respectively. The heat of formation of CH_(4) is

    A
    174.1 kJ
    B
    274.1 kJ
    C
    374.1 kJ
    D
    74.1 kJ
  • Heat of formation of benzene, CO_(2(g)) and H_(2)O_((l)) are 45 kJ, -394 kJ and - 286 kJ respectively. Hence heat of combustion of benzene is

    A
    - 1885 kJ
    B
    `- 3177` kJ
    C
    - 3267 kJ
    D
    - 4080 kJ
  • The heats of combustion of C and CO are -393.5 and -283.5 kJ mol^(-1) respectively . The heat of formation (in kJ) of CO per mode is

    A
    `676.5`
    B
    `-676.5`
    C
    `-110.5`
    D
    `110.5`
  • CENGAGE CHEMISTRY-THERMODYNAMICS-Exercises (Subjective)
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    2. Calculate the heat of formation of acetic acid form the following date...

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    3. State the third law of thermodynamics.

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    5. Calculate the heat of formation of n butane from the followinf data: ...

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    6. Calculate the heat of combustion of benzene form the following data: ...

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    7. If 2AI(s) +1(1)/(2) O(2)(g) rarr AI(2)O(3)(s), DeltaH =- 1667.8 kJ H...

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    8. The thermochemical equation for solid and liquid rocket fuel are given...

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    9. When 1g liquid naphthalene (C(10)H(8)) solidifies, 149J of heat is evo...

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    10. a. A cylinder of gas is assumed to contain 11.2 kg of butane. If a nor...

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    11. The free enegry changes for the two reactions given below are a. SO(...

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    12. Given that: i. C("graphite") +O(2)(g) rarr CO(2)(g), DeltaH =- 393.7...

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    13. Given: i. H(g) +CI(g) rarr HCI(g) DeltaH =- 431 kJ ii. HCI(g) +aq ...

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    14. Given: NaCI(s) +aq rarr Na^(o+) (aq) +CI^(Theta) DeltaH = 3.9 kJ N...

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    15. What would be the heat released when:

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    16. Enthalpy of neutralisation of acetic acid by NaOh is -50.6 kJ mol^(-1)...

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    17. The polymerisation of ethylene to linear polyethylene is represented b...

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    18. An athelete is given 100g of glucose (C(6)H(12)O(6)) of energy equival...

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    19. How much hea is liberated when one mole of gaseous Na^(o+) combines wi...

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    20. State a chamical reaction in which DeltaH and DeltaU are equal .

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