The bond energy (in $\mathbf{kcal} \mathbf{mol}^{\boldsymbol{-} \mathbf{1}}$) of a C-C single bond is approximately

JEE Advanced · 2010 · 11 Apr 2010 · Paper 1 · Chemical Thermodynamics

The bond energy (in

kcal mol^{- 1}

) of a C-C single bond is approximately

(A)1
(B)10
(C)100✓ Correct
(D)1000

Answer: (C)

Solution

The C–C single bond energy is approximately 83 kcal/mol (or about 347 kJ/mol). Among the given options, 100 kcal/mol is the closest order of magnitude. Bond energies for typical covalent bonds range from tens to hundreds of kcal/mol, making option C the correct choice.

JEE Advanced · 2010 · 11 Apr 2010 · Paper 1 · Single correct option

Practise more: all JEE Advanced PYQs on Chemical Thermodynamics →

More JEE Advanced questions on Chemical Thermodynamics

An ideal gas (0.5 mol), initially at 2 bar pressure, is compressed at a constant temperature of 600 K in two steps : first against a constant external pressure of P bar $(2 < P < 8)$ , and then against constant external pressure of 8 bar. At each step, the compression is st …
JEE Advanced 2026View solution →
List-I contains various physical/chemical processes, and List-II contains combinations of changes in enthalpy $(Δ H)$ and entropy $(Δ S)$ . Match each entry in List-I to appropriate entry in List-II, and choose the correct option.

| List-I | | List …
JEE Advanced 2026View solution →
Considering ideal gas behavior, the expansion work done (in kJ) when 144 g of water is electrolyzed completely under constant pressure at 300 K is ____.

Use: Universal gas constant $(R) = 8.3 J K^{- 1} mol^{- 1}$ ; Atomic mass (in amu): …
JEE Advanced 2025View solution →
Consider the following volume-temperature (V - T) diagram for the expansion of 5 moles of an ideal monoatomic gas.

(see diagram)

Considering only P-V work is involved, the total change in enthalpy (in Joule) for the transformation of state in the sequence …
JEE Advanced 2024View solution →
The entropy versus temperature plot for phases $α$ and $β$ at 1 bar pressure is given.
$S_{T}$ and $S_{0}$ are entropies of the phases at temperatures T and 0 K, respectively.

(see diagram)

The transition temperature for $α$ to …
JEE Advanced 2023View solution →
The entropy versus temperature plot for phases $α$ and $β$ at 1 bar pressure is given.
$S_{T}$ and $S_{0}$ are entropies of the phases at temperatures T and 0 K, respectively.

(see diagram)

The transition temperature for $α$ to …
JEE Advanced 2023View solution →