## Uma Bansal is teaching live on Unacademy Plus

I/ DPP Thermodynamics and molar volume of solid ice is 19.64 , The entropy chan necessary to melt ice at -10 C if molar volume of liquid'water is 18.01 ml melting process is 16.3 J/K (assume and volume remains constant in this temperatureangeba IITJAM2012 Q2. Phase diagram of a compound is shown below: below CSIRJRF 2016Tua) CO The slope of line OA, AC and AB are tan u/4 , tan 7/6 Hofmeltting respectively are 300 K and 3 KJ/mole respectively the change in volume of melting is a) 10 tan /3 'b) 10 tan Tt/4 c) 10 cot T/3 d) 10 cot T/4 Q 3 Determine the incorrect statement regarding the giyen graph and tan r/3 respectively, if melting point and lquid solidBas Temperature a) M.P increase with pressure b) M.P decrease with pressure c) B.P increase with pressure d) solid liquid gas can coexist at same pressure and temperature

Ps-p Ta-T

18 olml (9.61 (-19) 3 (o-3 ool Bas

LA 3 2 d P

T-360 K

1e010

mix Q 6 The vapour pressure of Benzene is 5333 Pa at 7.6 C and 53330 Pa at 60.6 C calculate the heat of vaporization of benzene and normal boiling point of benzene. JAM 2014 Chemistry Q7 Thevapour pressure of solid and liquid is given as log.psolid-24 (3900/T) and loge Pliquid 18-(2600/T) wherePsolid and Pliquidare the vapour pressure in torr) of solid and liquid chiorine near the triple point respectively and T is the absolute temperature. The ratio of slope of solid gas curve to the slope of liquid gas curve at the Triple point in P-T diagram is. Q8. For the liquid to vapourequillibirium of a substance dP/dT at 1 bar and 400 K is 8x103 bar K1 .If negligible than molar enthalpy of vapourization is a) 640 KJ/mole (b) 100 KJ/mole (c) 80 KJ/mole (d) 64 KJ/mole JAM 2013 Chemistry the molar volume in the vapour form is 200 L mole and molar volume in liquid form is -I CSIR JRF

log 53330 Ally . 1 4- Al 0.0005661 O oo0S66

DVV P (1325N 533

Pa Puswd-4oS Iu 21.lo ul 677 K- JI.lo_34.Iy3