IDNLearn.com is your trusted platform for finding reliable answers. Ask your questions and receive reliable and comprehensive answers from our dedicated community of professionals.

What is the value for ΔG at 5000 K if ΔH = -220 kJ/mol and ΔS = -0.05 kJ/(mol·K)?

A. -470 kJ
B. -195 kJ
C. 470 kJ
D. 30 kJ


Sagot :

To find the value of [tex]\(\Delta G\)[/tex] at [tex]\(5000 \, \text{K}\)[/tex] given that [tex]\(\Delta H = -220 \, \text{kJ/mol}\)[/tex] and [tex]\(\Delta S = -0.05 \, \text{kJ/(mol} \cdot \text{K)}\)[/tex], we use the Gibbs free energy formula:

[tex]\[ \Delta G = \Delta H - T \Delta S \][/tex]

Substitute the given values into the formula:

[tex]\[ \Delta G = -220 \, \text{kJ/mol} - (5000 \, \text{K} \times -0.05 \, \text{kJ/(mol} \cdot \text{K)}) \][/tex]

Next, we perform the multiplication inside the formula:

[tex]\[ 5000 \, \text{K} \times -0.05 \, \text{kJ/(mol} \cdot \text{K)} = -250 \, \text{kJ/mol} \][/tex]

So the equation now becomes:

[tex]\[ \Delta G = -220 \, \text{kJ/mol} - (-250 \, \text{kJ/mol}) \][/tex]

Subtracting a negative is the same as adding a positive:

[tex]\[ \Delta G = -220 \, \text{kJ/mol} + 250 \, \text{kJ/mol} \][/tex]

Finally, combine the terms:

[tex]\[ \Delta G = 30 \, \text{kJ/mol} \][/tex]

So, the value of [tex]\(\Delta G\)[/tex] at [tex]\(5000 \, \text{K}\)[/tex] is:

[tex]\[ \Delta G = 30 \, \text{kJ/mol} \][/tex]

Therefore, the correct answer is:

D. [tex]\(30 \, \text{kJ}\)[/tex]