Decide which types of relief devices and configuration should be used for the following situations. Explain. a. The process fluid is highly toxic. b. The process operates close to the MAWP of the vessel. c. The process fluid tends to polymerize and plug. d. A very large relief is required. e. Two relief scenarios are identified: runaway reaction requiring a very large relief and a relief for more routine and much lower-pressure excursions. f. The process has regular and large pressure cycles. g. The fluid in the process contains liquid with small diameter solid particles. h. The process and vessel operate at very high pressures. i. A high-pressure scenario occurs very quickly. j. The process is at a high temperature. k. The relief discharges into a header with pressure fluctuations due to other activities elsewhere in the plant. l. The relief must discharge a high volume of fluid.

Which substances have the lowest melting points: ionic covalent, or metallic

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

Problem #3 (ch. 1, problem 15)the ideal gas law provides one way to estimate the pressure exerted by a gas on a container. the law isí‘ťí‘ť=푛푛푛푛푛푛푉푉more accurate estimates can be made with the van der waals equationí‘ťí‘ť=푛푛푛푛푛푛푉푉â’푛푛푟푟â’푞푞푛푛2푉푉2where the term nb is a correction for the volume of the molecules and the term an2/v2is a correction for molecular attractions. the values of a and b depend on the type of gas. the gas constant is r, the absolutetemperature is t, the gas volume is v, and the number of moles of gas molecules is indicated by n. if n = 1 mol of an ideal gas were confined to a volume of v = 22.41 l at a temperature of 0â°c (273.2k), it would exert a pressure of 1 atm. in these units, r = 0.0826.for chlorine gas (cl2), a = 6.49 and b = 0.0562. compare the pressure estimates given by the ideal gas law and the van der waals equation for 1 mol of cl2 in 22.41 l at 273.2 k. what is the main cause of the difference in the two pressure estimates, the molecular volume or the molecular attractions?