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Why are the principles of thermodynamics important for the study of biology?
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7. Energy and Metabolism
Introduction to Energy
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How do you calculate the change in free energy (ΔG) in a system?
A
ΔG = ΔH + TΔS
B
ΔG = ΔH - TΔS
C
ΔG = ΔS - TΔH
D
ΔG = TΔH - ΔS
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Understand the Gibbs free energy equation: ΔG = ΔH - TΔS, where ΔG is the change in free energy, ΔH is the change in enthalpy, T is the temperature in Kelvin, and ΔS is the change in entropy.
Identify the values for ΔH, T, and ΔS in the system you are analyzing. These values are typically provided in the problem or can be measured experimentally.
Ensure that the temperature (T) is in Kelvin. If it is given in Celsius, convert it to Kelvin by adding 273.15.
Substitute the values of ΔH, T, and ΔS into the equation ΔG = ΔH - TΔS. Use MathML to represent this substitution: .
Calculate the result using the substituted values to find the change in free energy (ΔG) for the system.
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