CHEMISTRY COMMUNITY

Danielle Paisley 1H

Can someone clarify the difference between kinetic stability and thermodynamic stability?

Danielle Paisley 1H

Hi, can someone help me with the Kinetics Achieve question 8?

Danielle Paisley 1H

It is important to note that this is a second-order reaction and we need to find how long, in seconds, it takes for the concentration of A to decrease from 0.630 M to 0.310 M. For the second-order reaction, we use equation, 1 over the concentration of the reactant. The time is equivalent to k. This ...

Danielle Paisley 1H

We are provided a reaction where the reaction in A is converted to some product B. After this, the balanced equations given by A make 2 B. It is a 2 to the 1-mole ratio for the product to react. We are trying to determine the rate of change of B. Time equals 0 to 352 seconds. First, we will find the...

Danielle Paisley 1H

Can someone help/give me tips on how to balance redox reactions? Thanks!

Danielle Paisley 1H

In order to answer this question, we need to set up the potential energy diagram. On the y-axis, we have potential energy and this is in the units of kJ and the x-axis shows the reaction progress. The delta H value is 24 kJ and this is a positive value. This means that is an endothermic reaction. To...

Danielle Paisley 1H

We are provided the rate constant per order reaction and that is k. This value is 0.0370 moles per second. We also have the initial concentration. It decreases from 0.910 M to 0.280 M. We are going to use these values to determine how we can find the time required to reduce the compound from 0.910 M...

Danielle Paisley 1H

na bro

Danielle Paisley 1H

Danielle Paisley 1H

Danielle Paisley 1H

Danielle Paisley 1H

Danielle Paisley 1H

so cute

Danielle Paisley 1H

Danielle Paisley 1H

me with the powerpoint

Danielle Paisley 1H

Danielle Paisley 1H

Danielle Paisley 1H

my favorite one

Danielle Paisley 1H

Danielle Paisley 1H

Danielle Paisley 1H

There are a couple of differences between thermochemistry and thermodynamics. Thermodynamics relates to energy. It deals with the transformations of energy. However, thermochemistry is related to different chemical reactions rather than energy. This specifically relates to the changes in the reaction.

Danielle Paisley 1H

I do not think we need to know the specifics. However, it would be helpful to know about closed systems since it has been in a few examples. Hope this helps!

Danielle Paisley 1H

Hi! I solved it by carefully looking at all of the reactions and examining what was happening. Ask yourself, "When the reactants and products get converted, what happens?" By doing this, you will determine which one can break the bonds and which one forms the bonds. This will help you to d...

Danielle Paisley 1H

Dr. Lavelle

Thank you so much for all of the resources that you provide! The music, jokes, and engagement help the class to enjoy learning new material despite challenges. You demonstrate your genuine passion for educating your students and it allows us to perform to our highest ability!

Danielle Paisley 1H

The chemical reaction inside the instant cold pack is endothermic since it can absorb the heat around it. Due to this reason, it will cool off the area around it. This is exactly the reason why a placing a cold pack on your skin makes you cold. Hope this helps!

Danielle Paisley 1H

Yes, it automatically grades the homework. However, it will update your new score when you complete more questions! Hope this helps!

Danielle Paisley 1H

You should create an ICE table with the pH, pOH, and Kb values. After this, you can determine the percent ionization by taking the ratio of OH in comparison to the original compound. Finally, you can multiply it by 100 and you will have your answer. I hope this helps!

Danielle Paisley 1H

The 5% is simply there to allow you to check if the approximation of the initial concentration is equal to the initial concentration due to the small value of K (under 10^-3). When it is below 5%, the approximation is appropriate.

Danielle Paisley 1H

It needs a substantial amount of extra heat to become a liquid to gas in contrast to a solid to a liquid. The reasoning is that it overcomes higher intermolecular forces. When transforming from a liquid to a gas, requires additional energy for the hydrogen bonds in the water molecules.

Danielle Paisley 1H

Hello, there is no difference between the dissociation constant and the ionization constant. They are essentially synonyms for each other. Hope this is helpful!

Danielle Paisley 1H

They are not required; however, they help to keep the information organized. After getting comfortable with the steps, it might not be necessary to use them anymore. Hope this helps!

Danielle Paisley 1H

Interesting article details how the sun converts plastic and CO2 into fuel. This is very promising for a sustainable future!
https://www.anthropocenemagazine.org/20 ... chemicals/

Danielle Paisley 1H

What is fish that is made up of two sodium? 2Na (tuna)

Danielle Paisley 1H

Doing my best to prepare for the exam helps me to experience less anxiety. Rather than cramming for a final the night before, it is important to get an ample amount of sleep to ensure that you are well-rested. Breathing techniques have also helped me to remain calm during high-stress situations such...

Danielle Paisley 1H

Yes, aqueous substances are included in the K equation, but pure substances are not. If the aqueous solutions were not used, then it would only measure the partial pressure and that is inaccurate.

Danielle Paisley 1H

Thank you so much! This is excellent advice and I look forward to growing my knowledge of Chemistry through this course!

Danielle Paisley 1H

No, K is not always known. As some previous students said, we can use the equilibrium concentration to calculate the value. However, we are unable to solve the problem if there isn’t a value for K or the equilibrium concentration.

CHEMISTRY COMMUNITY

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Stability

Question 8

Re: Number 10 on Kinetics Achieve

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Tips on balancing redox reactions

Re: #17 Kinetics Achieve HW

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Re: Which phases to include in the K equation?

Re: Advice from a Medical Student [ENDORSED]

Re: Will the value of K always be known? [ENDORSED]