Question

LAPIOL PEDOU STOPAD 2. Each student has been assigned a common gas or volatile liquid compound. (A) Do you expect the compound you have been assigned behave like an ideal gas at standard temperature and pressure? (This can be quantified by comparing the pressure of the compound using the Van der Waals equation of state to that of the ideal gas equation of state). The Van der Waals equation of state is one of the most common used to understand the behavior of real gases. (B) Determine the critical temperature (Te) and critical pressure (Pc) for the assigned compound. (C) Make a P-V Plot (Pressure vs Volume Graph) and show an isotherm of the real gas equation of state 20°C above, 20°C below and at the critical temperature. (D) Graph the same three isotherms that were plotted in part (C) but using the ideal gas law.

Answer 1

(a) common gas or valatile lg compound unlike ideal gas have interactims bw molecules and molecules do occupy space at standard Temperature and places. Thus, Lothat do not wrict it to bhaid diam dul 901 10) Vanderwall's egg.is Pressure Dolial gas renulost (Pt.) (Vm-6) - RT weboten sadbare barematures that are determined Muar Ical empirically for each gos b- ralum wupied dy mole of a gus At fixed temp., eq ai pilds a morima & minisma at two bounts where . ut a particular temperature, the most and min. come into a single intration peent where 2 ).-0 in addition to (a), -o. This point is the critical puent. & temperature , presente are called critical temperature To, critical Beecree bo ay21 lavt Now KL. +ìa =0 (r-62 moi 1 mele Vm =V! r

() = Ciil » Vor [636] ( 's reduel wee) 2 3 w, from boy be to our to co to Put rc = V = 36 & TC = T = Panimus 2786 2762 (c) Real grous esotherm Tetho Cretical prent - Tc-20 articol tema udhurim PoE -- -

Fox T > Pk , liquefaction of gas u imposible even at wory high lemos (2) for ideal a gas Pre MRT 7 P = MRT W, lap = 0 = nRTI- ei veritical isn't a fine value ravce to, this cutical point doesn't make sense fere Poleal gas Isotherm Ttao T-20