Chemical Thermodynamics Quiz

sc19.4 Entropy changes in chemical reactions

All processes occur under standard conditions at 298 K unless stated otherwise.
Please round your answers to the hundredths place (e.g. 1.01 g) and try to get within 2% of the correct answer.
You can enter your answers in decimal notation, or you can enter them in scientific notation using 'E' or 'x 10^' for the power of 10 (e.g., enter 6.02 x 10²³ as 6.02E23 or 6.02x10^23).

Helpful resource from LibreTexts "Chemistry - The Central Science":
• 19.7: Free Energy and the Equilibrium Constant

Here's your quiz - good luck!

#	Problem	Answer
1.	Given: CH4 (g) + NH3 (g)  →  HCN (g) + 3 H2 (g) Substance S° ammonia gas (NH3(g)) 192.8 J/mol·K hydrogen cyanide (HCN(g)) 201.8 J/mol·K hydrogen gas (H2(g)) 130.7 J/mol·K methane gas (CH4(g)) 186.3 J/mol·K Wanted: entropy change (ΔS°) in J/K?	J/K

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