00:01
Let's have a look what all is given in the problem.
00:04
Given is three reactions are given.
00:07
First one is c2h2 with 5x20 will form 2 co2 plus h2 and delta h for the reaction is given as minus 1 ,300 kilojoules.
00:26
Next reaction that is given is c plus o2 will form co2.
00:32
And delta h for this reaction is minus 394 kilojoule.
00:39
Last one that is given is h2 plus half o2 will combine to form h2 and delta h for the reaction is minus 286 kilojoule.
00:52
This is given and what we are supposed to find out is we need to find the delta h of the reaction for this reaction.
01:02
So we need to find the delta h for this reaction.
01:13
Let's write the reaction first.
01:16
The reaction is 2 carbon plus h2 will form c2h2.
01:22
For this reaction we need to find the, like basically for this reaction we need to calculate delta h.
01:35
And we also need to find like delta h for the reaction if it contains 28 grams if it has 28 grams of carbon so for finding out this let's try to calculate first let's get the required equation so for getting the required equation we need suppose these are the three equations let them as 1 2 and 3 let this is 1 1 second and and third.
02:08
So these are the three reactions we can see.
02:12
Now, if we multiply equation 2 by 2, and equation 3 in it and subtract equation 1.
02:22
So the reactions will be 2c plus 2o2 will form 2co2 and this will be minus 78, all are in kilojoules only...