# Tagged Questions

A thermodynamic state function describing the total energy content of a system.

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### Why does it not matter what mass of NaOH is used to solve for q?

So we recently did a lab in Chem to prove Hess's law. The reactions we performed were 1) NaOH + HCl ---> NaCl + H2O 2) NaOH(s) + HCl --- NaCl + H2O 3) NaOH(s) ---> Na+ + OH- One of our post lab ...
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### How to find how much work in a chemical reaction [on hold]

I'm having some troubles figuring out how to do this question and some explanation or hints can be useful to help me solve it! How much work (in J) is involved in a chemical reaction if the volume ...
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### Is time a measurement of Entropy?

Is time a measurement of entropy? Is it because time is increasing forever? Well after reading about the Second Law of Thermodynamics and working with Entropy, I began to realize that if time can be ...
I have answered this question and got a value of $\mathrm {1409 \space kJ\ mol^{-1}}$ however, the answer sheet says $\mathrm{-1009}$. Using the equation: $$\ce{C2H4 + 3O2 -> 2CO2 + 2H2O}$$ I ...