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Your answer is partially correct. Ethyl alcohol has a boiling point of 78.0*C, a freezing point of -114*C, a heat of vaporization of 879 kJ/kg,
Your answer is partially correct. Ethyl alcohol has a boiling point of 78.0*C, a freezing point of -114*C, a heat of vaporization of 879 kJ/kg, a heat of fusion of 109 KJ/kg and a specific heat of 2.43kJ/kg-K. How much energy must be removed from 0.580 kg of ethyl alcohol that is initially a gas at 78.0"C so that it becomes a solid at -114 C? Number i 10415 Unitse s g e 5 e e (a)What is the rate of energy loss in watts per square meter through a glass window 2.0 mm thick if the outside temperature is -23F and the inside temperature is +81*F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 5.7 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of window glass is 1.0W/m-K_ and of air is 0.026 W/m-K_) (a) Mumber n Units w (b) Number n Units v Current Attempt in Progress Ice has formed on a shallow pond, and a steady state has been reached, with the air above the ice at -6.5C and the bottom of the pond at 4. 2C. If the total depth of ice + water is 1.4 m, how thick is the ice? (Assume that the thermal conductivities of ice and water are 0.40 and 0.12 cal/m-C*s, respectively.) Number n Units v Rod 1, with a thermal conductivity of 354 W/m-K, rod 2, with a thermal conductivity of 232 WYm-K, and rod 3, with a thermal conductivity of 78.3 W/m-K, are placed end to end with rod 2 between the other two. The rods have the same length and the same diameter. The free end of rod 1 is maintained at water's boiling point. and the free end of rod 3 is maintained at water's freezing point. What is the steady-state temperature of (a) the rod 1-rod 2 junction and (b) the rod 2-rod 3 junction? (a) Mumber n Units L (b) Number n Units v
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