Definitions

Question 1

Partial Molar Volume

Answer 1

In general, the partial molar volume of a substance X in a mixture is the change in volume per mole of X added to the mixture.

Question 2

Molar Volume

Answer 2

The volume occupied by one mole of a substance at a given T and P

Question 3

Specific Volume

Answer 3

Volume occupied by 1kg of substance (given T and P?

Question 4

Adiabatic

Answer 4

A process where there is no transfer of heat between a system and its surroundings

Question 5

isobaric

Answer 5

constant pressure

Question 6

closed system

Answer 6

no mass transfer between the system and surroundings

Question 7

triple point

Answer 7

the temperature and pressure where gas, liquid and solid can coexist in equilibrium with eachother

Question 8

allotropy

Answer 8

the existence of a chemical element in 2 or more forms with different arrangements of atoms

Question 9

critical point of pure fluid

Answer 9

the temperature above which the fluid is supercritical and the liquid and its vapour can coexist

Question 10

bubble point temperature

Answer 10

the temperature at which the first bubbles of gas evolve from the liquid

Question 11

Specific heat capacity at constant pressure

Answer 11

the heat required to increase the temperature of 1 mol of a substance by 1 K under isobaric conditions

Question 12

Vapour pressure

Answer 12

the pressure exerted by a vapour in thermodynamic equilibrium with its condensed phases at a given T in a closed system

Question 13

Partial pressure

Answer 13

the pressure that a gas in a mixture of gases would exert if it occupied the same volume as the mixture at the same temperature

Question 14

bubble point pressure

Answer 14

the pressure at which the first bubbles of gas evolve from the liquid

Question 15

open system

Answer 15

a system that can freely exchange mass and energy across its surroundings

Question 16

latent heat

Answer 16

the heat required for a substance to change phase without any temperature change

Question 17

isothermal

Answer 17

constant temperature

Question 18

specific entropy

Answer 18

entropy per unit mass, where entropy is the amount of energy unavailable to do work*??)

Question 19

ideal mixture

Answer 19

a mixture with thermodynamic properties analogous to those of a mixture of ideal gases. DH_mixing=0 and DV_mixing=0

Question 20

partial molar volume

Answer 20

change of volume of whole solution as a function of change of moles of one species when the number of moles of the other species is kept constant