The chemical reacson that causes chromium to corrode in air is given by Gibbs Fr

Question

The chemical reacson that causes chromium to corrode in air is given by Gibbs Free Energy: Temperature Dependence The cheical reaction thot PMM n which at 298 K Gisbs free energy (G) is a measure of the spontaneity of a chemical reaction. It is the chemical potential for a reaction, and is minimized at equiltbrium. It is delined as asrm =-549.1 J/K G=H-TS where H is enthalpy, T is temperature, and S is entropy Part A i energy for this eacton? Assume the commonly used standard reference temperature of 298 K Express your answer as an integer and include the appropriate units Submit My Answers Give Up Incorrect: Try Again Part B What is the Gbbsfree energy f this reaction at 4717 K?Assume that ar and Express your-nswer to two decimal places and include S do not change with temperature the appropriate units 344 kJ

Explanation / Answer

A)

deltaH = -2256.0 KJ

deltaS = -549.1 J/K

= -0.5491 KJ/K

T = 298 K

we have below equation to be used:

deltaG = deltaH - T*deltaS

deltaG = -2256 - 298 * -0.5491

deltaG = -2092 KJ

Answer: -2092 KJ

B)

deltaH = -2256.0 KJ

deltaS = -549.1 J/K

= -0.5491 KJ/K

T = 4717 K

we have below equation to be used:

deltaG = deltaH - T*deltaS

deltaG = -2256.0 - 4717.0 * -0.5491

deltaG = 334 KJ

Answer: 334 KJ

Feel free to comment below if you have any doubts or if this answer do not work. I will correct it and submit again if you let me know

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