Question

Argon has normal melting and boiling points of 83.8 and 87.3 K; its triple point is at 83.8 K and 0.7 atm, and its critical temperature and pressure are 151 K and 48 atm. State whether Ar is a solid, liquid, or gas under each of the following conditions: a. 0.9 atm and 90 K b. 0.7 atm and 80 K c. 0.8 atm and 88 K d. 0.8 atm and 84 K e. 1.2 atm and 83.5 K f. 1.2 atm and 86 K g. 0.5 atm and 84 K

Answer 1

This question is solved on the basis of phase diagram.
Salution- The given value in question be- Newsmal nulting bosed of Augon = 85.8K was mich boiling point of Augon = 87.3k Techeratur aut Pusegwu of beible point = (TP) = (85-8 Kota Colts cal femperceptimes = 1516 Coutical Puseum z 48 cm vow we can draw phase diagram of Argon- fechal ALBURY 9&eting Liquid (atm) Solid Pues nou Glas! (86, 1:2) (83-5,% e multtug fatm- 1890. biling beret ck pepatun? T a Cook,64) CCH// / ic 0. 7 [84,0-5) 151K 80 183-4 Continal temperatera) Triple Temperature (k) point

a) 0.ameud OK + ax (D) 0.7 atm and Sok - Solid © 0-atom and 38k →gas @ osath and 89-k Liquid @ 72 ct and 35k + $06d 1) -2. c4fon and 86% Liquid 1905m and & 4-R9448