Search found 10 matches

by 204643643
Sat Mar 12, 2016 1:09 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Most stable conformation of 1-chloro-1-ethylcyclohexane
Replies: 2
Views: 628

Re: Most stable conformation of 1-chloro-1-ethylcyclohexane

The Chlorine would be in the equatorial position since it is much larger than Carbon.
by 204643643
Sat Mar 12, 2016 12:31 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Double Bonds and Single Bonds with cis and trans
Replies: 1
Views: 369

Re: Double Bonds and Single Bonds with cis and trans

In our class, we were only told that double bonds and rings have the cis and trans quality.
by 204643643
Sun Feb 21, 2016 4:33 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Rate Laws
Replies: 2
Views: 458

Re: Rate Laws

I don't think there are any qualitative ways of measuring overall rate law, and if there are, then they may only apply under certain conditions. The only truly effective way is to individually calculate the factor change in each reactant.
by 204643643
Sun Feb 14, 2016 5:13 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Equation to find k when there's more than 1 reactant
Replies: 2
Views: 438

Re: Equation to find k when there's more than 1 reactant

Just to be clear the subscripts of '0' indicate that the concentrations of the previous two are negligible? Thanks.
by 204643643
Sun Feb 07, 2016 3:06 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Ideal Gas with no specific heat capacity
Replies: 1
Views: 425

Re: Ideal Gas with no specific heat capacity

When someone in my discussion section asked a similar question, my TA responded by saying that the coefficients are determined by the gases' degree of freedom, where it is able to move in different directions. For monotonic gases, the three movements are only translational, whereas for other, more c...
by 204643643
Sun Jan 31, 2016 5:15 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Cell Potentials and Equilibrium Constant
Replies: 1
Views: 341

Re: Standard Cell Potentials and Equilibrium Constant

The way I understand it is that the standard cell potential is sort of like a measurement of voltage difference between the cathode and anode. The equilibrium constant has more to do with the ratios of products and reactants once an equilibrium is reached.
by 204643643
Sun Jan 24, 2016 5:08 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Reversible Processes
Replies: 1
Views: 356

Re: Reversible Processes

One really helpful tip from my TA is that for irreversible reactions, the pressure it constant, which allows us to take out P from the equation and place it in front of the integral. But for reversible reactions, pressure is not constant (due to the small changes taking place), forcing us to replace...
by 204643643
Sun Jan 17, 2016 6:11 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity of a Monoatomic Ideal Gas (9.13)
Replies: 7
Views: 1083

Re: Heat Capacity of a Monoatomic Ideal Gas (9.13)

As far as I understand, R is not necessarily always going to be 8.314. We use that value when we are solving a problem that deals with Joules. But if we are solving a problem that has to do with atm and Liters, the value 0.082 is used.
by 204643643
Sun Jan 17, 2016 5:58 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Finding change in internal energy using PV=nRT equation
Replies: 3
Views: 1887

Re: Finding change in internal energy using PV=nRT equation

298 Kelvin is the same as 25 Celsius, the standard temperature that is typically used in various equations and formulas. Hope this helped.
by 204643643
Sun Jan 10, 2016 3:00 pm
Forum: Phase Changes & Related Calculations
Topic: Melting/Evaporation vs Vaporization
Replies: 4
Views: 877

Re: Melting/Evaporation vs Vaporization

My understanding of this concept is that sublimation or "direct vaporization" is the transition from the solid phase to the gas phase, completely skipping the liquid phase.

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