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For a process with ΔH = 200 kJ and ΔS = 0.5 kJ/K, what is ΔG at 400 K?
For a process with ΔH = 200 kJ and ΔS = 0.5 kJ/K, what is ΔG at 400 K?
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Q1
For a process with ΔH = 200 kJ and ΔS = 0.5 kJ/K, what is ΔG at 400 K?
200 kJ
180 kJ
220 kJ
160 kJ
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ΔG = ΔH - TΔS = 200 kJ - 400 K * 0.5 kJ/K = 200 kJ - 200 kJ = 0 kJ.
Questions & Step-by-step Solutions
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Q
Q: For a process with ΔH = 200 kJ and ΔS = 0.5 kJ/K, what is ΔG at 400 K?
Solution:
ΔG = ΔH - TΔS = 200 kJ - 400 K * 0.5 kJ/K = 200 kJ - 200 kJ = 0 kJ.
Steps: 6
Show Steps
Step 1: Identify the values given in the problem. We have ΔH = 200 kJ, ΔS = 0.5 kJ/K, and T = 400 K.
Step 2: Write down the formula for calculating ΔG, which is ΔG = ΔH - TΔS.
Step 3: Calculate TΔS by multiplying T (400 K) by ΔS (0.5 kJ/K). This gives us TΔS = 400 K * 0.5 kJ/K = 200 kJ.
Step 4: Substitute the values into the ΔG formula: ΔG = 200 kJ - 200 kJ.
Step 5: Perform the subtraction: 200 kJ - 200 kJ = 0 kJ.
Step 6: Conclude that ΔG = 0 kJ.
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