required lo change the kinetic enttgy U onnstitu n. les d. The speed at which pa

Question

required lo change the kinetic enttgy U onnstitu n. les d. The speed at which particles trove is directly proportional to vir malar mass. E. Molecular vibratuns uuribine both kineti: and prential eneray ta gas-phase eu molecule I. Which of the fallawing slalements regarding: It ear cupaciky is incoTect? a. Specific heat capacity reivn lo the amount ol alergy requiral to rzise temperature of lg of substance by I'C cuns pr:ssure. b Dinerent substances have differett best capacitiet re of sub ke depends c. The amount of rgy required to change the or car tzunt vvivrnx. whether the mocess nc:urs ennstant prea are Heat capacity is an propery an exensive paperty. e. The mola heal capawily a suir is 22. Which af the es ei -dicted decrezse tha entropy of sy 2. Thu number uf parti in reasts ncreasea Volume Pressare inuteasa. the system. e. Au of these incrwust use entropy of

Explanation / Answer

(21) (e) The molar heat capacity of a substnace is not extensive but intensive property.

(22) (d) Pressure increase. As it increases the volume will be decreased, hence less space is availabel for the motion of particles hence randomness decreases and thus entropy decreases.

* (c) At equilibrium deltaG= 0 and SInce K is given positive value deltaG0 < 0

* (c) CHCl3 has the largest dipole moment.

(28)

(B) Pi Molecular orbital. Because it is formed by the overlapping of atomic orbitals perpendicualr to the onternuclear axis.

(29)

(e) s- atomic orbitals can only form sigma molecular orbitals.

(3)

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