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A kitchen oven has an interior volume V of 0.12m3 . The initial pressure, P0, inside the oven equals the outside pressure of 1000 hPa. The air in the oven is then heated from an initial temperature T0 of 20 C to a baking temperature T1 of 175 C.
a) If the oven were perfectly sealed so that no air escaped, what would the pressure be inside the oven when it reached its final temperature?
b) If the door has an area of 0.25 m2, what would the net force acting on the door be if someone opened it without relieving the pressure first?
c) If the oven is not sealed (the normal case), air will leak out as the air expands from heating, so that inside pressure always equals the outside pressure. Assuming that the air leakage is one-way (no outside air enters the oven), what fraction of the original mass of air in the oven is lost due to expansion?
While in Europe, if you drive 109 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 29.0 mi/gal? Assume that 1euro=1.26 dollars.
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 10-3 g of H2SO4 per liter
A cell measured by a student was found to be -0.461V against a Ag/AgCl reference electrode (0.222V). What is the potential when measured against SCE and NHE
Coal combustion can affect freshwater or marine (saltwater) organisms in different ways. Describe the steps involved in one such way, from combustion to the effect(s) on one species or group of organisms.
Luminol is a reagent used to detect blood at crime scenes. A technician prepares a stock solution by adding 6.0 g of luminol (molar mass=177 g/mol) to 50.0 mL of H2O.
Calculate the change in entropy (in J/K) when a 67.9 g of water is heated from 14.8 ºC to 74.0 ºC at 1 atm. (The specific heat is 4.184 J/(g-K).)
An unknown compound has the empirical formula CH2. A 0.050-mol sample of this compound weighs 4.20 g. What is the molecular formula of this compound?
what is the amount of heat kj required if 64.0 kg of h2o is heated from 25degc to 85degc? 200.0 g al c 0.900 at
a hospital needs 1 millicurie of a radioactive pharmaceutical with a half-life of 12 hours. if delivery time takes 3
An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 392 pm, and the density of the crystal is 21.45 g/cm3. Calculate the atomic weight of the element (in g/mol)
What is the pressure in psi for a pressure head of 46.2 feet? What is the pressure in psi for a pressure reading, in psi, at the bottom of a 30 feet high reservoir, which has a diameter of 50 feet?
125 mole of oxygen gas is added to carbon in a .25L container. The mixture equilibriates at 500K. Calculate the equilibrium concentration of carbon monoxide, knowing that K=.086 at 500K.
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