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2 moles of ideal gas at 300K, with an initial volume of 25L, are compressed under an external pressure of 2800 torr. Assuming the temperature and the initial energy of gas do not change, what is the entropy change of this gas? (assume heat flow is reversible)
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 265.0 Torr at 45.0 °C. Calculate the value of ?H°vap for this liquid. Also, calculate the normal boiling point for this liquid.
acetylene gas c2h2 used in welding produces an extremely hot ?ame when it burns in pure oxygen according to the
calculate a value for the equilibrium constant for the reaction below. hint when reactions are added together the
Hydronium ion concentration using Henderson-Hasselbalch equation - What is the hydronium ion concentration of a solution
What Amount of enrgy has been transferred to heat the water? (The specific heat capacity of water is 4.184 J/g *C )
As a food chemist for a major potato chip company, you are responsible for determining the salt content of new potato chip products for the packaging label.
When 0.89 g ZnCl2 is dissolved in 280. mL of 0.150 M NaCN, what are [Zn2+], [Zn(CN)42- ], and [CN- ] [Kf of Zn(CN)42- = 4.2 multiplied by 1019]
A solution of barium hydroxide, Ba(OH)2, contains 4.285 g of barium hydroxide in 100.0 mL of solution. What is the molarity of the solution? Show all work and include units throughout your calculations
A 23.45g piece of iron and a 29.95g piece of gold at 100.00C were dropped into 530ml of water at 16.05C. The molar heat capacities of iron and gold are 25.19 (j/mol x C) and 25.41 j/(mol x C). respectively. What is the final temperature of water a..
Calculate the number of coulombs required to produce 6.53 g of Hg from an aqueous solution of Hg2+
Mixtures of helium and oxygen can be used in scuba diving tanks to help prevent "the bends." For a particular dive, 46L He at 25°C and 1.0 atm and 12L O2 at 25°C and 1.0 atm were pumped into a tank with a volume of 5.0L.
Three moles of C(s) are heated from 300K to 600 K at constant P. Over the temperature range, Cp = -12.19 + 0.1126 T/K - 1.947 x 10-4 T^2/K^2. Find delta H and delta S.
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