General
Easy
Chemistry-

Given that standarheat enthalph oCH4,C2H4 andC3H8are–17.9,12.5,–24.8Kcal/mol. The ΔH foCH4+C2H4→C3His-

Chemistry-General

  1. 55.2Kcal    
  2. 30.2Kcal    
  3. 19.4Kcal    
  4. 55.2Kcal    

    Answer:The correct answer is: –55.2Kcal

    Book A Free Demo

    +91

    Grade*

    Related Questions to study

    General
    chemistry-

    The enthalpoformatioof ammonia is–46.0KJ mol–1.Thenthalpchangfothreaction 2NH3(g)→N2(g)+3H2(gis-

    The enthalpoformatioof ammonia is–46.0KJ mol–1.Thenthalpchangfothreaction 2NH3(g)→N2(g)+3H2(gis-

    chemistry-General
    General
    chemistry-

    Thstandarmolar heat oformatioof ethane, CO2,andwater(ellarrespectively21.1,–94.1and 68.3Kcal.Thestandardmolarheatofcombustion of ethanwill be-

    Thstandarmolar heat oformatioof ethane, CO2,andwater(ellarrespectively21.1,–94.1and 68.3Kcal.Thestandardmolarheatofcombustion of ethanwill be-

    chemistry-General
    General
    chemistry-

    Since the enthalpof the elements in their standard states is taken to be zeroThheat oformation Hfof compounds–

    Since the enthalpof the elements in their standard states is taken to be zeroThheat oformation Hfof compounds–

    chemistry-General
    General
    chemistry-

    Theenthalpyofareactionat273Kis–3.57KJ. whatwillbetheenthalpyofreactionat373Kif ΔCp=zero-

    Theenthalpyofareactionat273Kis–3.57KJ. whatwillbetheenthalpyofreactionat373Kif ΔCp=zero-

    chemistry-General
    General
    chemistry-

    FothreactionH(g)+½O (g)=H O(ell), ΔC =7.63cal/deg;Δ=68.3Kcal, what will be thvalue (in Kcal) of ΔH at 100°C-

    FothreactionH(g)+½O (g)=H O(ell), ΔC =7.63cal/deg;Δ=68.3Kcal, what will be thvalue (in Kcal) of ΔH at 100°C-

    chemistry-General
    General
    chemistry-

    From the reaction P(White) →P(Red); ΔH=–18.4KJ,iffollowsthat-

    From the reaction P(White) →P(Red); ΔH=–18.4KJ,iffollowsthat-

    chemistry-General
    General
    physics

    The current taken from the 30V supply and the current through the 6Ω resistor are respectively.

    The current taken from the 30V supply and the current through the 6Ω resistor are respectively.

    physicsGeneral
    General
    physics

    If a copper wire is stretched to make it n=0.1% longer, then what is the percentage change in its resistance?

    If a copper wire is stretched to make it n=0.1% longer, then what is the percentage change in its resistance?

    physicsGeneral
    General
    physics

    temperature coefficient of resistance of wire is 1.25cross times 10 cubed divided by c c  At 300 k , its resistance is What is the temperature at which its resistance becomes 2Ω ?

    temperature coefficient of resistance of wire is 1.25cross times 10 cubed divided by c c  At 300 k , its resistance is What is the temperature at which its resistance becomes 2Ω ?

    physicsGeneral
    General
    physics

    The reciprocal of resistivity is called…….

    The reciprocal of resistivity is called…….

    physicsGeneral
    General
    chemistry-

    The structure of the following polymer is :

    The structure of the following polymer is :

    chemistry-General
    General
    physics

    A wire has resistance R subscript 0, What will its resistance if it is stretched to double, What is its length ?

    A wire has resistance R subscript 0, What will its resistance if it is stretched to double, What is its length ?

    physicsGeneral
    General
    physics


    What is its resistance across AB?


    What is its resistance across AB?

    physicsGeneral
    General
    physics

    A 10 m wire potentiometer is connected to an accumulator of steady voltage. A 7.8 m length of it balances the emf of a cell on 'open-circuit'. When cell delivers current through a conductor of resistance 10Ω it is balanced against 7.0 cm of the same poleutomelic. What is the internal resistance of the cell?

    A 10 m wire potentiometer is connected to an accumulator of steady voltage. A 7.8 m length of it balances the emf of a cell on 'open-circuit'. When cell delivers current through a conductor of resistance 10Ω it is balanced against 7.0 cm of the same poleutomelic. What is the internal resistance of the cell?

    physicsGeneral
    General
    physics

    A potentiometer is preferred over a voltmeter to measure the emf of a cell because....

    A potentiometer is preferred over a voltmeter to measure the emf of a cell because....

    physicsGeneral