Define critical temperature and critical pressure. In terms of the kinetic molecular theory, why is it impossible for a substance to exist as a liquid above its critical temperature?
Answer to relevant QuestionsThe critical point of NH3 is 132oC and 111 atm, and the critical point of N2 is –147oC and 34 atm. Which of these substances cannot be liquefied at room temperature no matter how much pressure is applied? Explain. Iodine, like most substances, exhibits only three phases: solid, liquid, and vapor. The triple point of iodine is at 90 torr and 115oC. Which of the following statements concerning liquid I2 must be true? Explain your ...Boron nitride (BN) exists in two forms. The first is a slippery solid formed from the reaction of BCl3 with NH3, followed by heating in an ammonia atmosphere at 750oC. Subjecting the first form of BN to a pressure of 85,000 ...For each of the following solute–solvent combinations, state the sign and relative magnitudes for ΔH1, ΔH2, ΔH3, and ΔHsoln (as defined in Fig. 17.1 of the text). Explain your answers. Figure 17.1 In the flushing and cleaning of columns used in liquid chromatography, a series of solvents is used. Hexane (C6H14), chloroform (CHCl3), methanol (CH3OH), and water are passed through the column in that order. Rationalize ...
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