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1.a)How many joules of heat energy do you need to heat 200 mlof water from 20ºC to 80ºC? Use 4.19 J/gºC forthe specific heat of water.
b) How long would it take if the water were being heatedcontinuously by a 50 Watt heater?
c) How much heat energy would it take to heat 100 ml of waterfrom 60ºC to 90ºC? (You can easily answer thisquestion by simply comparing the amount of water and the amount oftemperature change to that in (a) and then adjusting the resultaccordingly).
2) A piece of aluminum (specific heat 0.910 J/gºC) of mass200 g at 80.0ºC is dropped into a foam cup filled with 100 mlof water at 20ºC. Once the system reaches equilibrium,what is the final temperature of the water and the aluminum?
How many gallons of ethanol can be produced per 100 tons (bone dry short ton) of dry corn stover. Assume the corn stover composition. 40% glucan, 30% xylan, 15% lignan, 10% ash. and 5% protein-others.
Assume that you have 1.65g of nitroglycerin in a 614.0 mL steel container at 20.0 C and 1.00 atm pressure. An explosion occurs, raising the temperature of the container and its contents to 425 C
State whether each of the following is a physical or a chemical property of copper. has good corrosion resistance high melting point doesn't react with water reacts with oxygen
a gas at 763 mmhg and 31 degrees C occupies a volume of 4.98 L. Calculate its volume at STP in g/mole
A graduated cylinder contains 148 of water. A 17.0 piece of iron (density = 7.86 ) and a 19.0 piece of lead are added. What is the new water level in the cylinder?
If the BaSO4 residue was baked in an oven at 100C for several hours rather than air drying, what effect would this have on its mass and how would the initial concentration of H2SO4 be affected
Which of the following pH values would you expect from the addition of a small amount of a dilute solution of a strong base?
The solubility of KNO3 is 38 g/100 g H2O at 20 degrees Celsius and 1.50 times 100 g/100 g H2O at 70 degrees Celsius. A solution is prepared by mixing 45 g of KNO3 in 35 g H2O at 70 degrees Celsius. Will all of the potassium nitrate dissolve at 70 ..
Some students wanted to react a piece of aluminum with sulfuric acid. the students wanted to make sure that they had reliable results and decided to measure their lab temperature and pressure
a meteorological ballon contains 250.0l he at 22 degrees celsius and 740.0mm hg. if the volume of the ballon can vary
Sodium hypochlorite, NaOCL, is the active ingredient in household bleach. What is the concentration of hypochlorite ion, if 20.00mL of bleach requires 32.00mL of 0.500 M HCL to reach the equivalence point
The Ka for lactic acid is 1.4x10^-4. What is the pH of this buffer after .10 mol of solid NaOH has been added?
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