The standard molar heat of formation of ethane, `CO_(2)` and water (l) are -21.1, -94.1 and -68.3 kcal, respectively. The standard molar heat of combu

Question

The standard molar heat of formation of ethane, `CO_(2)` and water (l) are -21.1, -94.1 and -68.3 kcal, respectively. The standard molar heat of combu

The standard molar heat of formation of ethane, `CO_(2)` and water (l) are -21.1, -94.1 and -68.3 kcal, respectively. The standard molar heat of combustion of ethane will be
A. `-373kcal`
B. `162 kcal`
C. `-240kcal`
D. `183.5 kcal`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Related Questions

The standard enthalpics of formation of `CO,NO_(2)` and `CO_(2)` are `110.5 KJ mol^(-1), -33.2 KJ mol^(-1)` and `-393.5 KJ mol^(1)` respectively. The

2 Answers 4 Views

Compressibility factor for `CO_(2)` at 400 k and 71.0 bar is 0.8697. Molar volume of `CO_(2)` under these

2 Answers 4 Views

A mixture of ethane and ethene occupies 41 L at atm and 500 K. The mixture reacts compeletly with 10/3 mole of oxygen to produce `CO_(2)` and water. T

2 Answers 8 Views

The standard molar entropy of `H_(2)O(l)` is 70 `JK^(-1)mol^-1`. Standard molar entropy of `H_(2)O(s)` is

2 Answers 4 Views

`C(s)+O_(2)(g)toCO_(2)(g),DeltaH=-94` kcal `2CO(g)+O_(2)to2CO_(2),DeltaH=-135.2` kcal The heat of formation of `CO(g)` is

2 Answers 4 Views

`CH_(2)=CH_(2)(g)+H_(2)(g) to CH_(3) to CH_(3)(g)` The heat of reaction is [bond energy of C=C=80 kcal, C=C=145 kcal, C-H=98 kcal, H-H=103 kcal]

2 Answers 4 Views

`DeltaH` for combustion of ethene and ethyne are -341.1 and -310.0 kcal, respectively. What will be the ratio of calorific values of ethane and ethyne

2 Answers 4 Views

The standard molar heat of formation ethane, `CO_(2)` and water (l) are respectively -21.1, -94.1 and -68.3 kcal. The standard molar heat of combustio

2 Answers 4 Views

If the heat formation of `CO_(2)` is -393kJ. The amount of heat evolved in the formation of 0.176 kg of `CO_(2)` is

2 Answers 4 Views

LiOH reacts with `CO_(2)` to form `Li_(2)CO_(3)` (atomic mass of Li=7) the amount of `CO_(2)` (in g) consumed by 1g of LiOH is closet to

2 Answers 5 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - A
`DeltaH_("reaction")=sum DeltaH` of product `-sum DeltaH` of reactants
`DeltaH_(f)C_(2)H_(6)=-21.1kcal," "DeltaH_(f)" "CO_(2)=-94.1kcal`,
`DeltaH_(f)" "H_(2)O=68.3kcal`
`C_(2)H_(6)+(7)/(2)O_(2) to 2CO_(2)+3H_(2)O`
`DeltaH_("combustion")=[2DeltaH_(f)CO_(2)+3DeltaH_(f)" "H_(2)O]-[DeltaH_(f)" "C_(2)H_(6)+(7)/(2)DeltaH_(f)O_(2)]`
`=[2xx(-94.1)+3(-68.3)]-[-21.1+(7)/(2)xx(0)]`
`=(-188.2-204.9)+21.1`
`=-393.1+21.1=372kcal`