WEBVTT
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All right, guys say we're going to be he
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looking at problems. Problem number seventy four are we're
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going to be looking at figure out thie standard rental
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p of re of reaction for these four different reactions
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. So in first one, we have calcium oxide
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wreck of a child from katherine chloride and water.
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Remember that the age of reaction is equal to the
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delta h approx monthly a Delta H other reactions That's
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has his law. No. So we're going to
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do this. So minus two. Forty one point
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eight two two minus ninety two. Wait, three
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is your minus. That's it. That's right.
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As the wrong number minus seven. Ninety five point
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eight minus two times ninety two point three three minus
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six. Thirty five point five. And that is
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five. So that s O that Delta H for
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here is minus two seventeen, twenty five to still
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a jewels from all. Now, for this question
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, we're going to do that's us, remember And
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Molly, an element in standard state, like oh
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to, for example, the Delta zero. So
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we have eight. Twenty two as our only product
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to a twenty point sixteen minus four times minus two
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. Seventy one point nine. Fine. So are
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the H is going to be two. Sixty five
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point four for killing Jules Promote. It's again.
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We're going to do what we've been doing before.
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So s O and a two. Thirty three point
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eight four minus one. Seventy point seven minus the
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reactant. So ninety point three seven minus two times
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negative. One. Fifty six point one. You
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know why I don't care? Those ages five thirty
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nine point four three Kill a Jules. And now
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we're going to be going too. That's two.
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Number four or so we have. That's it.
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We are going to do the same thing you've been
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doing before for remember. Oh, too, there's
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no doubt H value for that. So two times
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at most. Two. Eighty five eight three plus
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ninety by point four zero minus snus. Four times
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they could have forty six point one nine. Fine
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. So we have to. That's like two eight
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eight three plus ninety five point for minus four time
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Negative. Forty six tonight, one nine. So
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that means our adult age value is two two,
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ninety one point five. Kill a Jules Ramon so
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we can use has his law to figure out the
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term of the enemy of every reaction. Just member
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Delta Age of your reaction is the The Delta H
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of the reaction is equal to us is equal to
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the price minus l th reactive. And it's I
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just one moment I want to make sure that I
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did not make a mistake here. And I believe
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I did this minus ninety three, seven minutes to
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us, too. Yeah, that they mistake big
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. This should be a plus sign. I think
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the actual answer is eighty four point nine seven.
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I apologize for the inconvenience.