Chemistry, 02.01.2020 22:31, phil820

Which of the following would have the shortest c-c bond length ch3ch3 chch - ch2ch2 all have the same bond length ch3ch2oh

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answered: studentms5313

The molecule having shortest C-C bond is acetylene (CHCH)

Explanation:

Note : CH3CH2OH has longest bond length

The bond length order from longer to shorter is :

CH3CH2OH > CH3CH3 > CH2CH2 > CHCH

(More bond order shorter the bond length)

The C-C bond length in Ethanol $CH_{3}CH_{2}OH$ is more than ethane

Here there is single bond between the carbons $sp^{3}-sp^{3}$ overlapIt has lowest Bond-dissociation energy (88 Kcal/mole)

The C-C bond length in Ethane $CH_{3}CH_{3}$ is 1.54 Angstrom

Here there is single bond between the carbons $sp^{3}-sp^{3}$ overlapIt has low Bond-dissociation energy (90 kcal/mole : means bonds are long and broken easily but 2 kcal/mole stronger than ethane)Bonds are shorter than ethanol.

The C-C bond length in Ethene $CH_{2}CH_{2}$ is 1.34 Angstrom

Here there is double-bond between the carbonsThe C-C bond distance is shorter than ethane $sp^{2}-sp^{2}$ overlapIt has high Bond-dissociation energy than ethane (bonds are stronger than ethane)

The C-C bond length in acetylene

$CH_{2}CH_{2}$ is 1.20 Angstrom

Here there is triple-bond between the carbons sp-sp

overlapThe C-C bond distance is shortest of all It has maximum Bond-dissociation energy.Strongest and shortest bond

answered: Guest

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1