Organic Chemistry Answers

explain the greater bond energy of N = N as compared to C = C

In general, alkanes adopt their staggered conformations preferentially to their eclipse conformations in order to minimize what type of molecular strain?

The enthalpy of formation of NH3(g) as per the following reaction is -46.11 kJ/mol

at 298 K.

Calculate the value of enthalpy of formation of NH3(g) at 100 oC. The p C

values are given as: N2(g) = 29.12; H2(g) = 28.82; NH3(g) = 35.06. Assume the

given heat capacity values to be temperature independent in the range.

Chitosan is derived from the shells of crustaceans. it is only soluble in an aqueous acidic medium but not in organic solvents. When reacted with phthalic anhydride, it forms an amide. The product is no longer soluble in the aqueous medium but now is soluble in organic solvents. 

a) Draw the product of the reaction between chitosan and phthalic anhydride.

b) Briefly explain the behaviour change in solubility of the starting material and the final product.

what is Nernst equation ?write its application

Determine (OH), ph and pOH of a solution [H]+ with 2.5 X 10 -8 M

1. An unknown compound containing C, H, N, and O elements in different multiples of the empirical formula. Using the data contained in the table, find me a) the empirical formula, and b) the molecular formula of a family member with a molar mass of 390 g/mol. 

Element Percent Composition (%) Molar Mass (g/mol)

C 36.9 12.01

H 6.2 1

N 32.3 14

O ? 16

NO2CH=CHCH3 + HBr

[a] Calculate the percentage of both the axial and equatorial forms of methylcyclohexane. Assume T = 25 °C. [b] Draw the equilibrating chair conformers. [c] Reading from the left to the right, is the equilibrium you’ve just illustrated representative of an exergonic or an endergonic process? [d] Based upon the response to part ‘c’, will ΔG be positive or negative? [e] Highlight the 1,3-diaxial interactions present in axial conformer.

Find the pka value of the following.