CHEMISTRY COMMUNITY

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Sooooooo how is this exam working now that were gonna be online?

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When is this equation used?

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Could we replace ln with log?

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Will we have to calculate Acivation NRG with this equation or just K ?

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How does the graph look for zero order reactions?

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Ln is easier and often used more.

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What differs when balancing acidic vs basic rxns?

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You add H20 first silly billy!

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How do you find free NRG using entropy and enthalpy?

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What is a galvanic cell?

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The units are volts which are J/C

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You must first balance the equation and then use the number of electrons you cancel out as the value for n.

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How do we choose what solid to put at the beginning?

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What order do we put the oxidation compounds in the diagram?

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What is the difference between E naught and E?

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Delta G naught is for a standard reaction ya silly goose! The normal delta g is for the overall reaction! hope that helps .

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well good sir, if the value is negative, it is spontaneous, meaning left over NRG in the form of heat is exuded from the reaction.

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Why is it that we can include Q and K in the equation? How do you know when to you which?

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Omg! Yes! ALWAYS

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I'll tell ya bud. Irreversible has a constant pressure (smaller area in curve) and reversible doesn't (bigger area in curve). Hope that helps buddy o !

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can you use this equation when at STP?

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What do these titles determine about one's system, and in turn what equation do you use?

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When can I use the delta S= q(rev)/T equation?

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How do you find the change in enthalpy for a reaction if you aren't given the values?

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What defines a phase change and how does that relate to which equation you use?

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Is Friday's lecture included in the midterm?

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When is it okay to keep the units in g/celsius?

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If an entropy/delta T problem doesn't specifically state it, do we assume it is at constant pressure or constant volume?

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How do we calculate heat capacities for diatomic molecules?

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What is a calorimeter and how does it relate to heat capacities?

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How is it that when bonds are broken and NRG is released, a compound is more stable?

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How would you define state functions, and why is enthalpy not considered one?

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In a way, enthalpy is the amount of heat released or absorbed in a reaction.

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Will we be provided the enthalpies of each compound when calculating the reaction enthalpies?

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Are we expected to know how to calcuate using all 3 methods or is there a focus on one over the other?

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What is the difference between k1 and k2?

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What is the threshold for concentrations in which we are allowed to approximate?

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How do we check if our approximation is correct when finding ph?

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Will we have to know how to create a buffer for the test this week?

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Will we have to know about polyprotic acids for the test this week?

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Hello sir,
Thank you for all you do. I love the jokes at the end of class :)

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It helps to take 10 minutes before the exam to focus and breathe and just sit. It's very calming and helpful to remember you're more than a test grade.

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Do we have to memorize this equation or will it be given on tests?

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What do you do if the after using the quadratic equation and you get two positive answers?

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What factors affect equilibrium? Is it just temperature and pressure?

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Can the reactant quotient apply to both concentration and partial pressure, just as K does?

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How does the reactant quotient relates to K?

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Does the pureness of products or reactants affect equilibrium constant?

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Does a higher pressure affect the equilibrium constant?

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What exactly do we need to know about gases for this unit? Just a basic understanding of PV=nRT?

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Is the final exam cumulative?

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Should we be able to visually depict the hybridization or is the short cut- way of finding it out enough?

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What is the difference between the different type of dipole-dipole interactions?

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Do we need to know how to draw the shape of different bonds?

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How important is it to know exactly how to name compounds for the test?

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Is eV the unit that photons are measured in?

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Is the conversion for killograms that same that is used for kilojules?

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What is the difference between pi and sigma?

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Is there a table that has all the names/shapes we need to know? How does everyone know them already ???

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What is the difference between electronic density shape and molecular shape?

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Do we need to know this concept for the first midterm?

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How do you describe the interpretation of atomic orbitals in terms of probability?

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What is the relationship between Schrodinger's equation (H ψ = E ψ), wave functions, and orbitals?

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What are the factors affecting the energy of an electron in a many-electron atom?

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One of the Quantum World Guidelines states: * With respect to electron transitions that give rise to a UV or visible spectrum: understand the difference between electronic transitions in atomic orbitals (atomic spectroscopy) and electronic transitions in molecular orbitals (molecular spectroscopy). ...

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Will we need to know how the equation was derived?

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Do we need to memorize the order/presdentaion of 1s,2s, orbitals aka figure 2.12 in the textbook?

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In terms of electron configuration/orbitals, I understand where the s,p,d,and f come from but what defines the number that pretenses it. For example 1s, 2d or 3p, what do those numbers represent and how does one distinguish or assign an element as occupying 2p vs 3p?

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Is the Particle in a box experiment vital to know for the midterm? Or is just a concept that is skimmed over?

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Do we need to know this equation/its different forms, be able to calculate answers of NRG levels using it?

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I came across this problem in one of the modules: During a summer camping weekend 4 moles of butane (C4H10) gas were used for cooking. Chose the right balanced equation for the combustion of 4 moles of butane gas. What is the net number of moles of gas produced? What do they mean by net number and h...

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I know that in the course reader it says to read chapter 5 for a review for gases. But every time i try reading the textbook i get intimidated and i stop reading the textbook . Do you guys find it more helpful when you guys read the textbook? Although it's hard to follow at times, I feel like it ca...

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I noticed the solution manual often rounds to a whole number when dealing with mass, should we do the same?

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In terms of finding the Empirical formula, you wouldn't need molar mass to solve that problem right?

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How important is it to know all the rules for sig figs? I feel like I know some basics but not the more specific rules that pertain to addition/subtraction or multiplication/division?

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