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Drexel University

University of Kentucky

05:57

Monique Cook

What is energy? What is work? List some examples of each.

00:59

Eugene Schneider

Explain how the high specific heat capacity of water can affect the weather in coastal regions.

01:16

Explain how the sum of heat and work can be a state function, even though heat and work are themselves not state functions.

04:56

Shahriar Khan

What is a buffer? How does a buffer work? How does it neutralize added acid? Added base?

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here in this example. We're talking about the combustion off propane gas. We have C three h eight with 502 You were going to get three co 24 h d o. And R. Delta H is given as, uh, an ex atomic number minus 2004 to 4 killer jewels. They're asking us to first find the deltas surroundings at 25 Celsius. So our equation was Delta s surroundings equals two minus delta age of two reactions. Do I buy temperature? Now? Our temperature is 2 73 plus 25 because this is always to Calvin. So it's going to be to 98. Kelvin and our delta as surroundings is going to be equal to negative. Negative. Now, this is 2044. Killer Jules. I would like Thio turn it into jewels, so I'm going to multiply this value by 1000. So at three zeros do I buy 298? So my delta s surroundings is going to be equal to six point 86 times. Tend to the bar of three. Jules for Kelvin's. Now, we got this, uh, done. What we want to look at is the sign off the Delta system now to investigate. Signed. What we want to do is to look at the States. We have one plus five. So we have six gas states on the left hand side. On the right hand side, we have three plus four seven gas states as seven gas states arm or disordered than six gas states. The sign we're going to basically do products by distracting so the products, arm or disorder, so to sign or here is going to be a positive too. And we had a positive sign or here too. So a c they're asking us a sign off the universe. So what we had is Delta s universe equals two. Delta s off the system. Plus Delta s off the surroundings, both off them our poster. So Delta's universe is also going to be positive. So can we say that this reaction is spontaneous? Yes, because in every spontaneous process, the deltas universe is positive

Electrochemistry

Nuclear Chemistry

02:43

11:44

03:22

02:34

16:12

03:05

02:04

03:00

01:03

02:47

01:05