Why is it necessary to use a small diameter, thin-walled capillary for holding the sample in the melting point apparatus?

Q: 7.58 An 8 cm pipe carries water with a mean velocity of 2 m/s. If this pipe abruptly expands to a 15…

A: Head loss

Q: A deep-sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea…

A: It is given that,

Q: A copper-constantan thermocouple generates a voltage of 4.75 x 10-3 volts when the temperature of…

A:

Q: The initial temperature of a 1.00 L sample of argon is 20°C. The pressure is decreased from 720 mm…

A: Given: The initial volume is 1.00 L. The initial temperature is 20 C. The initial pressure is 720 mm…

Q: What is the physical significance of the Biot number? Is the Biot number more likely to be larger…

A: Biot number is the ratio of conduction resistance within the body to convection resistance at the…

Q: vessel contains one mole of O2 gas at a temperature T. The pressure of the gas is P. An identical…

A: C

Q: A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas…

A: Given Data: The diameter of the cylinder is d= 55.0 cm The height of the cylinder is h= 66.0 cm The…

Q: 46. A tube has a length of 0.015 m and a cross-sectional area of 7.0 31024 m2 . The tube is fi lled…

A:

Q: The table given shows the vapor pressure of water at 20.0ºC as 2.33×103 Pa. Use the ideal gas law to…

A:

Q: The pressure of a gas at the triple point of water is 1.35 atm. If its volume remains unchanged,…

A: Given: The pressure of a gas at the triple point of water = 1.35 atm The pressure at which the CO2…

Q: Viscosity of fluid plays a significant role in the analyses of many fluid dynamics problems. The…

A:

Q: O 10.567 Pa O 10.567 atm O 9.323 atm O 9.323 Pa O 1.263 Pa

A: Given 25% of urea solution =  25 g urea in 100 mL solution Temperature T         = 37 +273 = 310 K…

Q: The radius of an artery decreases from 1.2 to 0.50 cm due to atherosclerosis. If the average blood…

A:

Q: A sample of carbon tetrachloride rose to a height of 4.76 cm at 20°C in a capillary tube having an…

A: The sample rises to height h=4.76 cm=0.0476 m in a capillary tube of radius r=0.01 cm=0.0001 m…

Q: The following empirical equation correlates the values of variables in a system in which solid…

A:

Q: A sample of pure copper has a mass of 16.9 g. Calculate the number of moles in the sample and copper…

A: ....

Q: Calculate the average volume per molecule for an ideal gas at room temperature and atmospheric…

A: We know that, Ideal gas equation, PV=NkT          Equation 1 here, Atmospheric pressure, P=105 N/m2V…

Q: A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas…

A: T = 643K = 643-273.15 = 369.85°C = 370°C = maximum safe operating temperature Given : The vessel is…

Q: To what temperature must a gas sample initially at 27°C be raised in order for the average energy of…

A: The initial absolute temperature of the gas is, T=27+273.15 K=300.15 K The average energy of a gas…

Q: The figure below shows a gas contained in a vertical piston–cylinder assembly. A vertical shaft…

A:

Q: You are studying a liquid that you have just synthesized in the laboratory, and you would like to…

A: Solution: The following expression gives the relation between the entropy change and enthalpy of…