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Use Hess $ Law to determine AH (in kJ) for the following target reaction Do not include units in answerEqA NOlg) + % Clzlg) ~ NOCIg) Eq B : % Nzlg) + % 02(g) NO(g) ...

Question

Use Hess $ Law to determine AH (in kJ) for the following target reaction Do not include units in answerEqA NOlg) + % Clzlg) ~ NOCIg) Eq B : % Nzlg) + % 02(g) NO(g) 2nocIg) Nzlg) + 02lg) Clzlg)AH =-38.6 kJ AH = 90.3kJAH -

Use Hess $ Law to determine AH (in kJ) for the following target reaction Do not include units in answer EqA NOlg) + % Clzlg) ~ NOCIg) Eq B : % Nzlg) + % 02(g) NO(g) 2nocIg) Nzlg) + 02lg) Clzlg) AH =-38.6 kJ AH = 90.3kJ AH -



Answers

Use Hess' law and the changes in enthalpy for the
following two generic reactions to calculate $\Delta H$ for
the reaction $2 \mathrm{A}+\mathrm{B}_{2} \mathrm{C}_{3} \rightarrow 2 \mathrm{B}+\mathrm{A}_{2} \mathrm{C}_{3}$
$2 \mathrm{A}+\frac{3}{2} \mathrm{C}_{2} \rightarrow \mathrm{A}_{2} \mathrm{C}_{3} \quad \Delta \mathrm{H}=-1874 \mathrm{kJ}$
$2 \mathrm{B}+\frac{3}{2} \mathrm{C}_{2} \rightarrow \mathrm{B}_{2} \mathrm{C}_{3} \quad \Delta H=-285 \mathrm{kJ}$

Gibbs free energy DELTA G determines the spontaneity of a reaction. That is the reaction is spontaneous. If our delta is negative, the reaction is non spontaneous if delta is positive. So the equation is as follows, DELTA G is equal to delta H minus T delta S. We've done a lot of work on randomness in the previous videos. We haven't really looked at N thorpedo yet. So the first thing we need to be doing is transferring our temperatures from degrees Celsius to kelvin. So 82 degrees Celsius is 355 kelvin, where delta G is equal to negative, is equal to not point 293 Kill a jules. Subtract 355 Calvin, multiplied by negative 9.695 killer joules per kelvin. Delta G is 247.0 kg jewels. So then we can do the exact same with the remaining examples where we get negative 1313.8 kg joules, and finally we get 49.1 kg jewels for the final example. So we have three calculation calculations for delta G, and so remember that the gibbs free energy determines the spontaneity of the reaction. So the reaction is spontaneous. Of delta G is negative, so we have one negative delta G values. The other two are positive, so they are non spontaneous.

We know that the formula to calculate downtown this to call witness sort is Linus Elka each right, They're using this formula. Old equations. Let's start. Okay. We have got a each to be my mystery 85. Or I could cry to 98 with temperature. I think it's you. 1.29 Hello, Jewell. Per Kelvin will be. We have again minus creating fried. I could break 77 like two fries. Kill a jewel for Kelvin. CS minus 100 Came to have a break. You 98 Is your mind this morning? Treat a Cree killer actual Per Calkins. My looks created Cree Joel Per Kelvin and finally the we have minus woman for cab driver pricing These seven, that is he was minus one point for AEG killer chill for killing music Welcome minus 1.48 and pretend to part minus three Children account

Hello students in this question for the given values of delta H. Not we have to calculate the unhealthy of the reaction. That is DELTA H. Not for the reaction at temperature T. Equals 2 to 98 Calvin. Okay so DELTA H. Not for the reaction can be written for the particular. So tumor player by delta H. Not H. One not plus two delta H. Do not minus delta H. Three. Not. Okay so we have the given values. So tumor player by delta H. One not which is minus or 5 37 kg jal plus two. More players delta H. Two which is minus 6 80. Kill a jewel minus of delta X. Three which is 52. Okay so we can solve them. So this value will be minus of 1074 and this value is equal to minus of 1360 and -52. So after solving this value so we will obtain that this is completely after addition. This is minus of 2486 kg. Okay, so this is the and help for the reaction. Okay? Delta H. Are not. Okay. So from the given options, option B. Here is the correct answer for this problem. Okay. Thank you.

Here we are. Using the gibbs handholds equation to calculate the gibbs free energy. So we have delta G. Note is equal to delta H. Not minus T. Delta s. Not or you've got the entropy in the entropy. Well the entropy is delta S. Not the entropy delta H nought. So what we need to make sure that we have is our temperature in units of kelvin. That's very important for the these sorts of calculations. And so with this fast example, What we have is negative 362 kg jewels. Subtract 318 Calvin Multiplied by not point not 192 kilo jewels. Park Calvin. What we should get is negative 368 kg jewels for this fast example. Using the equation that we outlined at the beginning and not forgetting to combine our temperature to Calvin with the next example we should get a value of 709 kg jewels. That's endo thalamic. With our final example we have a small endo thermic reaction again 6.8 kg jewels


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