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If your air conditioner is more than several years old, it may use the chloroflurocarbon CCl2F2 as the heat transfer fluid. The normal boiling point of CCl2F2 is -29.8 C and the enthalpy of vaporization is 20.11 kJ/mol. The gas and the liquid have specific heats of 117.2 J/mol K and 72.3 J/mol K. How much heat is evolved when 20.0 g of CCl2F2 is cooled from +40 C to -40 C?
A 500.0 g iron bar at 212 degrees C is placed in 2.0L of water at 24.0 degrees C. What will be the change in temperature of the water?
During a recrystallization a student takes 1g of a white (colorless) solid and adds 5 mL of acetone. He heats the mixture in a boiling water bath and adds another
A clear container becomes a uniform color after a small amount of colored gas is added. A raindrop falls to earth.
The 1.000 L flask was filled with gas from the experiment at an atmospheric pressure of 30.57 inches of Hg and a temperature of 24 degrees C.
How would you write the Sn2 mechanism of sodium chlorophenolate with sodium chloroacetate?
Suppose that a 2.00-L metal bottle that contains air at 113K and 2.5 atm pressure is sealed off. If we inject 60.0 mL of liquid helium and allow the entire system to warm to room temperature (25°C), what is the pressure inside the bottle?
What is the C2O42- concentration in a solution that is 0.10 M in oxalic acid and 1.0 M in HCl? (Consider that the oxalic acid concentration at equilibrium for this common ion problem is 0.10 M.)
An equilibrium mixture for the reaction above contains [H2] = 1.00 M, [N2] = 1.50 M, and [NH3] = 2.00 M. What is the value of the equilibrium constant, Kc, for the reaction?
An organic material is extracted from water. The separatory funnel containins 10 mL of ether and 20 mL of water. Considering that the K (partition coefficient) value is 3.2,
A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25°C
The initial pH of chloroacetic acid is 1.90, (which I found from using the quadratic equation to find x in a RICE table because I was given the initial concentration of 0.124M and told to find the pH of a 10.0 mL solution.)
Iron reacts with chlorine gas as follows: 2 Fe (s) + 3 Cl2 (g) > 2 FeCl3 (s)
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