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Consider the following reactions carried out at a constant temperature and pressure. In which of these will the amount of work done be positive? Hint: only the coefficients of the reactants are given. All species are gas unless otherwise noted.
A) The synthesis reaction of 2 mol SO2 and 1 mol O2 to give SO3.
B) The synthesis reaction of 4 mol NO to give O2 and N2.
C) The decomposition reaction of 2 mol CCl2O to give CO and Cl2. D) The combustion of 2 mol CH3OH.
E) The conversion of 2 mol of solid I2 to gaseous I2.
The concentration which remains after 20 minutes is 80 mg/L. Determine the reaction order and the rate constant (with appropriate units).
a 4.5 g sample of LiCl at 25 C dissolves in 25 mL of water also at 25 C. The final equilibrium temperature of the resulting solution is 60.8 C. What is the enthalpy of solution.
Sodium borohydride reacts very slowly with ethanol to evolve a gas. Write a balanced equation for this reaction.
If 500 mL of air contains 2 x 1022 particles (atoms and molecules), how many particles do you inhale in one day if you breathe 15000 L of air?
Determine the empirical formula of estradiol. The molecular weight of estradiol was later determined to be 272. Determine the molecular formula of estradiol.
Why is mercury being replaced by other liquids such as colored alcohol as the temperature-sensing fluid
calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, C2H6O2 and 409 g of water.
The vapor pressure of pure CH2Cl2 (with molecular weight 85 g/mol) is 133 torr at 0?C and the vapor pressure of pure CH2Br2 (with molecular weight 174 g/mol) is 11 torr at the same temperature.
Assume every breath a person took is 0.5L of air, figure out how many grams of Oxygen you consume at every breath. Now assume that you breathe 30 times per second, figure out how long it took for you to consume all the oxygen in a sealed room of 1..
Multiple choice questions in nuclear chemistry - which equation represents the balanced nuclear equation
Suppose that 1.41 g of impure barium hydroxide is dissolved in enough water to produce 177.1 mL of solution and that 44.1 mL of this solution is titrated to the stoichiometric point
How many atoms of neon occupy a volume of 14.3 L at STP?
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