Home
Class 12
CHEMISTRY
What will be DeltaH for the reaction, ...

What will be `DeltaH` for the reaction,
`CH_(2)Cl_(2)rarrC+2H+2Cl`?
(B.E. of `C-H` and `C-Cl` bonds are `"416 kJ mol"^(-1)` and `"325 kJ mol"^(-1)` respectively)

A

0.7 g

B

1.4 g

C

2.8 g

D

5.6 g

Text Solution

Verified by Experts

The correct Answer is:
B
50% of reagent used by 50% of 6.45 g. `CH_(3)CH_(2)Cl`
Hence `(6.45)/(2)` g = 3.22g of `CH_(3) CH_(2)Cl` Consumed.
`underset((64.5g))(CH_(3)CH_(2)Cl)overset("reagent") to underset("(28g)")(CH_(2)) = CH_(2) + H^(+)Cl^(-)`
`therefore ` 64.5 g `CH_(3)CH_(2)Cl` produce ethene ` = 28 g `
`therefore` 3.22 g `CH_(3)CH_(2)Cl` produce ethene ` = (28g xx 3.22 g)/(64.5g)`
` = 1.39g ~~ 1.4g`
Promotional Banner

Similar Questions

Explore conceptually related problems

Calculate Delta H of the reaction H-overset(H)overset("|")underset(Cl)underset("|")(C )-Cl(g)rarr C(g)+2H(g)+2Cl(g) The bond energies of C - H bond and C - Cl bond are 415 kJ mol^(-1) and 326 kJ mol^(-1) respectively.

Calculate DeltaH^(@) ("in" kJmol^(-1)) for the reaction CH_(2)Cl_(2)(g)rarrC(g)+2H(g)+2Cl(g). The average bond enthalpie of C-H and C-C1 bonds are 414 kJ mol^(-1) .

Calculate DeltaH for the reaction H_(2)(g)+1//2O_(2)(g)toH_(2)O(g) given the bond energies of H-H and O=O bonds and O-H bond are 433 kJ mol^(-1) , 492 kJ mol^(-1) and 464kJ" "mol^(-1) .

Calculate enthalpy of formation of HCl if Bond enthalpies of H_2, Cl_2 and HCl are 434 kJ mol^(-1) , 242 kJ mo l^(-1) and 431 kJ mol^(-1) respectively.

Calculate C - Cl bond enthalpy from following reaction : CH_(3) Cl(g) + Cl_(2) (g) to CH_(2) Cl_(2) (g) + HCl(g) Delta H^(@) = - 104 kJ . If C-H,Cl - Cl and H - Cl bond enthalpies are 414, 243 and 431 kJ "mol"^(-1) respectively.

Calculate Delta G (in kJ) for the reaction at 300 K, H_(2)(g)+Cl_(2)(g) rarr 2HCl (g) Given at 300 K, BE_(H-H) = 435 kJ mol^(-1), BE_(Cl-Cl) = 240 kJ mol^(-1), BE_(HCl) = 430 kJ mol^(-1) Entropies of H_(2), Cl_(2) and HCl are 131, 223 and 187 JK^(-1) mol^(-1) respectively.

Calculate change in enthalpy for the reaction at 27^(@)C H_(2)(g)+Cl_(2)(g)rarr2H-Cl(g) by using the bond energy and energy data Bond energies of H-H,Cl-Cl and H-Cl bonds are 435 kJ mol^(_1), 240 kJ mol^(-1) and 430 kJmol^(-1) respectively.

Determine enthalpy change for the reaction, CH_(4(g))+Cl_(2(g))rarr CH_(3)Cl_((g))+HCl_((g)) Bond energies for C-H,C-Cl,Cl-Cl,H-Cl are 412,338,242,431k J mol^(-1) respectively.