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In some solar-heated homes, heat from the sun is stored in rocks during the day and then released during the cooler night. (a) Calculate the amount of heat required to raise the temperature of 78.7 kg of rocks from 25.0°C to 43.0°C. Assume that the rocks are limestone, which is essentially pure calcium carbonate. The specific heat of calcium carbonate is 0.818 J/g°C. (b) Suppose that when the rocks in part (a) cool to 30.0°C, all the heat released goes to warm the 10,000 ft3 (2.83 x 105 L) of air in the house, originally at 10.0°C. To what final temperature would the air be heated? The specific heat of air is 1.004 J/g°C, and its density is 1.20 x 103 g/mL
To do so she places 100.0g of water at 58.60C into the calorimeter which already contains 100.0g of water at 19.30C. The final temperature of the water in the calorimeter is 38.70C. What is the heat capacity of the calorimeter
the rate constants of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 305K and 315 K. What must the activation energy be for the rate constant to double as described?
A polyamide was prepared by bulk polymerization of hexamethylene diamine (9.22 g) with adipic acid (11.68 g) at 280 degrees C. Analysis of the whole reaction product showed that it contained 2.6 x 10-3 mol of carboxylic acid groups.
certain first-order reaction () has a rate constant of 1.00×10-2 at 45 . How many minutes does it take for the concentration of the reactant, , to drop to 6.25 of the original concentration?
The heat energy required to melt 1.00 g of ice at 0 degrees C is 333J. If one ice cube has a mass of 62.0 g, and a tray contains 16 ice cubes, what quantity of energy is required to melt a tray of ice cubes to form liquid water at 0 degrees C
The half-cell is a chamber in the voltaic cell where one half-cell is the site of an oxidation reaction and the other half-cell is the site of a reduction reaction.
DNA polymerase (DNA pol) requires divalent magnesium for activity. Alcohol dehydrogenase (ADH) requires nicotinamide adenine dinucleotide
consider the following reaction3caco3 2fepo4 ca3po42 fe2co33a which of the following reagents is the limiting
Experiments have shown that the average frequency of chirping by a snowy tree cricket depends on temperature as shown below. Chirping Rate Temperature
Adipic acid and citric acid have very similar melting points. Given two unkown samples, one being citric and the other adipic acid
how much must you perspire to maintain a constant body temperature assuming no other energy changes and all the calorie content of the soda is released as heat?
Ethanol (C2H5OH) is produced from the fermentation of sucrose in the presence of enzymes. C12H22O11(aq) + H2O(g) > 4 C2H5OH(l) + 4 CO2(g)
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