Synthesis of butane-2,3-diol from cis-2-butene may be accomplished in two ways: (i) OsO4 hydroxylation & (ii) C6H5CO3H epoxidation followed by NaOH opening of the epoxide ring.
Which of the following statements about the products from these reactions is correct?
A. the two methods giive the same product
B. two different isomers are formed, but both are chiral
C.(i) gives a chiral isomer (racemic) (ii) gives an achiral isomer
D. (i) gives an achiral isomer, (ii) gives a chiral isomer (racemic)

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

points

explanation: