A steel bar (448 J / (kg ° C)) at 280 ° C of 1 lbm is immersed in a tank of water at 100 ° C until thermal equilibrium is achieved. What volume of water evaporates? Assume that the enthalpy of vaporization of water is 2 257 kJ / kg. a) 16 199 kg b) 454 g c) 36 610.56 g d) 16.2 g

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What is the change in length in millimeters of a 3.00-cm-long column of mercury if its temperature changes from 29.0°C to 43.0°C, assuming the mercury is unconstrained lengthwise? mm

How many grams of coffee must evaporate from 700 g of coffee in a 190 g glass cup to cool the coffee and the cup from 95.0°C to 24.0°C? Assume the coffee has the same thermal properties as water and that the average heat of vaporization is 2,340 kJ/kg (560 cal/g). Neglect heat losses through processes other than evaporation, as well as the change in mass of the coffee as it cools. g Do the latter two assumptions cause your answer to be higher or lower than the true answer? O My answer is lower than the true answer because, if coffee loses heat in other ways and its mass decreases, it will need more evaporation for the same temperature drop. O My answer is higher than the true answer because, if coffee loses heat in other ways and its mass decreases, it will need less evaporation for the same temperature drop. O My answer is higher than the true answer because, if coffee loses heat in other ways and its mass decreases, it will need more evaporation for the same temperature drop. O My…