Thermodynamics generic equation applications

[atmega-ist]

Homework Statement

I've been given a generic equation-->

A(aq) + 3B(aq) + C(s) --> 2D(aq) + X(g)

and am asked to fill in three columns witht the headings "Asked to find" with a list of variables; "Which equation(s) should you use?"; and "Show the equation using the general reaction where applicable".

The Attempt at a Solution

The first two are delta-H and dela-S both with the degree symbol and these are simple enough but the third asks for delta-H with no degree symbol ad at 50 degees C. I have delta-H = delta-E + delta-nRT for "which equation(s) should you use?"

My first question is: is this correct?

Secondly, the answer table implies that there's a way to show the equation with the general reaction. How in the world is this done?

I know there's a difference between the reactions at 25C and others but I can't seem to find it ANYWHERE in my book or study guide.

Thank you.

 

[nate808]

Thank you for your post. It seems like you have been given a challenging task and I am happy to assist you with it.

Firstly, your approach to using the equation delta-H = delta-E + delta-nRT for the variables delta-H and delta-S is correct. This equation relates the change in enthalpy (delta-H) to the change in internal energy (delta-E), the number of moles of gas (delta-n), and the temperature (T). However, please note that the equation for delta-S is slightly different and includes the factor of T as well, so it would be delta-S = delta-E + delta-nRln(T2/T1).

Secondly, to show the equation using the general reaction, you can simply replace the variables A, B, C, D, and X with the specific compounds or elements involved in the reaction. For example, the general reaction would look like this:

A(aq) + 3B(aq) + C(s) --> 2D(aq) + X(g)

But if you know the specific compounds involved, you can replace them in the equation, for example:

NaOH(aq) + 3HCl(aq) + 2H2O(l) --> 2NaCl(aq) + CO2(g)

I hope this helps clarify your doubts. If you have any other questions, please don't hesitate to ask. Good luck with your assignment!