A- a small volume of cold water is used to cool off a cup ofcoffee that is initially too hot to drink. How many mL of water at4.0oC must be mixed with 485 mL of hot coffee (95.0oC) so that theresulting combination has a temperature of 70.0oC? Assume that thecoffee and water have the same density and specificheat.Ă‚Â Ă‚Â Ă‚Â
B- A 5.00 cm3 sample of aluminum at room temperature(25.00oC) was dropped into a 1 L beaker of boiling water(100.00oC) and allowed to come to equilibrium. How muchheat was absorbed by the aluminum cube? The specific heat capacityof aluminum is 0.902 J/g·K and its density is 2.70g/cm3.
C- When 50.00 g of 0.200 M NaCl (aq) at 24.1oC isadded to 100.0 g of 0.100 M AgNO3 (aq) at24.1oC in a calorimeter, the temperature increases to25.2oC as AgCl (s) forms. Assuming the specific heat of thesolution and products is 4.20 J/goC, calculate thenumber of joules of heat produced in the reaction.
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