What is the value for G at 1000 K if H = -220 kJ/mol and S = -0.05 kJ/(molK)?A.-270 kJB.-220 kJC.780 kJD.-170 kJ
Question
What is the value for G at 1000 K if H = -220 kJ/mol and S = -0.05 kJ/(molK)?
Options:
- A. -270 kJ
- B. -220 kJ
- C. 780 kJ
- D. -170 kJ
Solution
The value of G (Gibbs free energy) can be calculated using the formula:
G = H - TS
where: H is the enthalpy (-220 kJ/mol), T is the temperature in Kelvin (1000 K), and S is the entropy (-0.05 kJ/(molK)).
Substituting the given values into the formula, we get:
G = -220 kJ/mol - (1000 K * -0.05 kJ/(molK))
G = -220 kJ/mol + 50 kJ/mol
G = -170 kJ/mol
So, the correct answer is D. -170 kJ.
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