The heat of vaporization of water at atmospheric pressure is Lv = 2260 kJ/kg. a. How much of this heat represents work done to expand the water into steam against the pressure of the atmosphere? b. What becomes of the rest of the heat? At T = 1000C and p = 1.00 atm, the density of water is 1.00 x 10 3 kg/m3 and the density of steam is 0.600 kg/m3
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The heat of vaporization of water at atmospheric pressure is Lv = 2260 kJ/kg.
a. How much of this heat represents work done to expand the water into steam against the
pressure of the atmosphere?
b. What becomes of the rest of the heat? At T = 1000C and p = 1.00 atm, the density of water
is 1.00 x 10 3
kg/m3
and the density of steam is 0.600 kg/m3
.
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- a. Compute the specific heat capacity at constant volume of nitrogen (N2) gas. The molar mass of N2 is 28.0 g/mol. b. You warm 1.15 kg of water at a constant 1L volume from 20∘C to 30∘C in a kettle. For the same amount of heat, how many kilograms of 20∘C air would you be able to warm to 30∘C? Make the simplifying assumption that air is 100% N2. What volume would this air occupy at 20∘C and a pressure of 1 atm ?A2.9 kg lump of aluminum is heated to 95°C and then dropped into 10.0 kg of water at 5.0°C. Assuming that the lump-water system is thermally isolated, what is the system's equilibrium temperature? Assume the specific heats of water and aluminum are 4186 and 900 J/kg-K, respectively. Number i UnitsAt high noon, the Sun delivers 990 W to each square meter of a blacktop road. What is the equilibrium temperature of the hot asphalt, assuming its emissivity e = 1? (σ = 5.67 × 10−8 W/m2?K4) . a. 364°C b. 637°C c. 90.5°C d. 181°C e. 136°C
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