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Ethanol (C2H5OH) melts at?114°C and boils at 78°C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-KA.How much heat is required to convert 45.0 g of ethanol at 22°C to the vapor phase at 78°C?B.How much heat is required to convert the same amount of ethanol at -144°C to the vapor phase at 78°C?
A constant current 104.0 A is passed through an electrolytic cell having an impure copper anode, a pure copper cathode, and an aqueous electrolyte. How many kilograms of copper are refined by transfer from the anode to the cathode in a 15.5hour pe..
question on analysis an equilibrium mixture for the reaction 2h2sg 2h2g s2g was found to contain 1.0 mol h2s 4.0 mol
A box contains 126000 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
What would you use to prepare a buffer system with a pH of around 4.2. What would you use to make a buffer with a pH of around 9.2? Describe the process you used to choose the correct buffer for each pH.
A 32.0-g sample of water at 290. K is mixed with 48.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
How many kJ of energy are required to convert 747 grams of water (liquid) at 23.4°C to steam at 100°C? The following information is given for H2O:
Calcium has a work function of 4.64x10^-19 J. Which of the following wavelenghts will eject electrons from calcium
A mixture is made by mixing 40.7 mL 0.000200 M HCl with 38.3 mL of 0.000180 M NaOH. Based upon these values, the mixture's pH will be
A solution contains 0.10 M Ca2+ and 0.10 M Mg2+. What pH range would result in only Mg(OH)2 precipitating? Ksp for Ca(OH)2 is 6.5 ´ 10-6 and for Mg(OH)2 is 7.1 ´ 10-12.
How many kilograms of CaH2 are needed to fill a 147 L tank with compressed H2 gas at 160 atm pressure and 27 degrees C?
Evaluate reversibility of a process where an ideal monoatomic gas is first slowly compressed 10-fold by a gradually increasing external pressure (gas remains in thermal equilibrium with the surroundings) and then the pressure is rapidly removed al..
determine the partial pressure and the total pressure in a 2.50 L vessel containing the following mixture of gases at 17.8 degrees celsius
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