The dissociation energy of CH 4 and C 2 H 6 to convert them into gaseous atoms are 360 and 620 kcal / mol respectively. The bond energy of C - C bond is

Question

The dissociation energy of CH 4 and C 2 H 6 to convert them into gaseous atoms are 360 and 620 kcal / mol respectively. The bond energy of C - C bond is (A) 130 kcal / mol (B) 80 kcal / mol (C) 180 kcal / mol (D) 260 kcal / mol

Tardigrade Admin · Accepted Answer

CH 4(g) arrow C (g)+4 H (g) ; Δ H1=360 kcal / mol C 2 H 6(g) arrow 2 C (g)+6 H (g) ; Δ H2=620 kcal / mol Δ H2=6 × (Δ H1/4)+Δ H C - C Δ H C - C =620-((360/4)) 6=80 kcal / mol

Q. The dissociation energy of $C H_{4}$ and $C_{2} H_{6}$ to convert them into gaseous atoms are $360$ and $620 k c a l / m o l$ respectively. The bond energy of $C - C$ bond is

$130 k c a l / m o l$

$80 k c a l / m o l$

$180 k c a l / m o l$

$260 k c a l / m o l$

$C H_{4 (g)} \to C_{(g)} + 4 H_{(g)}; Δ H_{1} = 360 k c a l / m o l$

$C_{2} H_{6 (g)} \to 2 C_{(g)} + 6 H_{(g)}; Δ H_{2} = 620 k c a l / m o l$

$Δ H_{2} = 6 \times \frac{Δ H _{1}}{4} + Δ H_{C - C}$

$Δ H_{C - C} = 620 - (\frac{360}{4}) 6 = 80 k c a l / m o l$

Q. The dissociation energy of CH4​ and C2​H6​ to convert them into gaseous atoms are 360 and 620kcal/mol respectively. The bond energy of C−C bond is

130kcal/mol

80kcal/mol

180kcal/mol

260kcal/mol