Calculating delta G given the equilibrium constant and Kelvins.

The value of the equilibrium constant for a particular reaction is 2.34 x 10^3 at 298k. Calculate the change in G for this reaction.

entropy

If "change in" G > 0, then a. K=0 b. K>0 c. K<0 d. K>1 e. K<1

Calculating delta G given delta H and delta S.

Ammonia is synthesized from nitrogen and hydrogen gases at a temperature of 475 degrees Celsius. N2(g)+3H2(g) --->2NH3(g) If delta H = -92.2kJ and delta S= -0.1987kJ/K, what is delta G for the reaction? Provide the answer in kJ.

True and false questions about entropy and its relationships with states of matter and temperatures.

Which of these statements is false? a. For a given material, a gas would have a greater entropy than the solid. b. For a given material, a liquid would have a greater entropy than the gas. c. At 0 K, an ordered pure crystalline solid has an entropy of zero. d. For a given material, the liquid has a greater entropy th ...continues

entropy

Which of the following statement is false? a. "change in" H < 0 for exothermic reactions b. Generally, nature tends to move from more ordered to more random states c. "change in" S > 0 for systems that become more disorderly d. Reactions are spontaneous when "change in" G < 0 e. Reactions are spontaneous when ...continues

Entropy, enthalpy and the freezing of water

Which of the following is true for the freezing of water at 298K? a. "change in" H < 0 b. "change in" H > 0 c. "change in" S = 0 d. "change in" S > 0 e. both answers a and d are correct

Entropy and combustion of hydrogen gas

Which of the following is true for the combustion of hydrogen gas? a. "change in" H > 0 b. "change in" H < 0 c. "change in" S > 0 d. "change in" G > 0 at 300K e. "change in" G > 0 at all temperatures

voltaic cell reaction

A voltaic cell is based uon the following overall reaction: 2H+(aq)+Sn(s)-->H2(g)+Sn2+(aq) where E=0.141V. Calculate the equilibrium constant at 25 degrees Celsius.

Electrochemistry problem

How many coulombs of charge are required to oxidize 1.0g of copper to copper(II) ions?

Concentration in second order reactions

For the second-order reaction below, the concentration of A after 125 seconds is 0.0722M. If k=9.11x10(exponent negative 2)s(exponent negative 1), what was the initial concentration of A? 2A-->B rate=k[A](exponent 2) a. 0.406M b. 6.37x10(exponent 3)M c. 0.224M d. 11.5M e. 10.0M