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- Calculate the FW/MW of the ff;For a wall of constant thickness, the rate of heat transfer is defined as: Determine the rate of heat transfer, Q, from your garden to the living room of your home if the outside temperature is measured as 555oR and the inside temperature is 23.2°C. The wall of your living room has a surface area of ±20 m2. The thermal conductivity of bricks, k, is 0.6934 BTU/(hr.ft2.°F).560 cm3 of a gas weighs 1.55 g at STP. Calculate the MW of the gas.
- In a metered-dose inhaler (MDI), such as those used for asthma medication, medicine isdelivered by a compressed-gas propellant. (The device is similar in concept to a can of spraypaint.) When the inhaler is activated, a fixed amount of the medicine suspended in thepropellant is expelled from the mouthpiece and inhaled. In the past, chlorofluorocarbons(CFCs) were used as propellants; however, because of their reactivity with the Earth's ozonelayer, they have been replaced by hydrofluorocarbons (HFCs), which do not react withozone. Now HFC use is also being reduced due to their high global warming potential. In one brand of inhalers, the original CFC propellant was replaced by HFC 227ea (C3HF7,heptafluoropropane). The volume of the inhaler propellant reservoir is 1.00×102 mL, and thepropellant is charged into the reservoir to a gauge pressure of 4.443 atm at 23°C. An onlinesearch for properties of HFC 227ea yields the information that the critical temperature andpressure of the substance…Cereal is being dried in a vertical drier by air flowing countercurrent to the cereal. To prevent breakage of the cereal flakes, some of the exit air from the drier is recycled back to mix with the the moist fresh air. For each 1000 kg/hr of wet cereal fed to the drier, calculate the input of moist fresh air in kg/hr and recycle rate in kg/hr. The available data on stream compositions is (fractions): For water: Fresh air: 0.0132 Wet cereal: 0.200 Exit air: 0.263 Dried Cereal: 0.050 Air entering Dryer: 0.066Your careless, clumsy lab mate has accidentally allowed carbon monoxide to leak out of a reactor, causing your lab’s CO monitor alarm to sound. After you quickly put on the appropriate Personal Protective Equipment, you find the leak and seal it. Then, you close your lab door, shut the windows, and call OSHA to report the hazard.When OSHA technicians arrive, they begin ventilating the 3000-ft3laboratory by pumping 25 ft3/min of fresh air into the room and removing the contaminated air at the same rate. They put a shop fan in the laboratory, such that the air is well-mixed. They also install a digital CO composition monitor, which currently reads 2 mol%. OSHA tells you that the laboratory is safe when there is less than 35 ppm of CO in the lab.How long must you wait to get back to work?
- Assume that in a similar scenario, the room contains 0.01 atm of gasoline vapors (i.e. 1% by pressure or volume). Assuming that the average MW of air is still 28.9 g/mol and the average MW of gasoline is 114 g/mol, what is the F/A ratio in the room? If needed, use any additional assumptions provided in the first part of this question. Do not use scientific notation, commas, spaces, or units of % w/w in your answer.A 120. MW coal plant wants to add a SOXemissions control system to reduce its emissions. The emission control system has a capitalcost of $815 per kW and reduces SOX emissions by 98% to 0.0918 kg/MWh. Assume thelifetime of the emission control system is 20 years and the power plant produces 650GWh/y. a)What is the annualized cost of this system in dollars per year if the discount rate (interestrate) is 7.0 percent/year? What if the discount rate is 4.0 percent/year? b)What is the cost per 1.0399 x 104 kWh of electricity usage (the average annual U.S.residential electricity consumption in 2017 according to the EIA) at each of the discountrates specified in part a? c)What is the cost per metric ton of SOx removed at each of the discount rates specified inpart a? In the standardization of HCl against pure anhydrous Na2CO3, 1mL was found to be equivalent to 0.05g of the primary standard. Compute for the normality.
- What could be the assumption when the MW of the sample does not match calculated molecualr weight from ∆Tb = mKb despite carefull data processing? The sample is not the compound of interest There are some impurities that affeced the boiling temperature Low heat is used to achieve boiling condition none of the assumption is valid 1 and III are valid assumptions all are valid assumptions I and II are valid assumptions560 cm3 of a gas weighs 1.55 g at STP. Calculate the MW of the gas. Hint:what are the units of MW ... do you have any of these? How to find what you don't have ??? Note that you will have to convert 560 cm3 into liters ...Long-term space missions require reclamation of the oxygen in the carbon dioxide exhaled by the crew. In one method of reclamation, 1.00 mol of carbon dioxide produces 1.00 mol of oxygen, with 1.00 mol of methane as a by-product. The methane is stored in a tank under pressure and is available to control the attitude of the spacecraft by controlled venting. A single astronaut exhales 1.03 kg of carbon dioxide each day. If the methane generated in the recycling of three astronauts' respiration during one week of flight is stored in an originally empty 140-L tank at −45.0°C, what is the final pressure in the tank?
