4.1 - Thermodynamic Basis of Water Potential
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Practice Questions
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What does Gibbs Free Energy Change (∆G) signify in a biological context?
💡 Hint: Think about the conditions that make a process occur.
What is the formula for solute potential (Ψs)?
💡 Hint: What does each variable stand for?
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Interactive Quizzes
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What does a negative Gibbs Free Energy Change (∆G) indicate?
💡 Hint: Recall what it means for a reaction to happen naturally.
True or False: Water will always move from an area of high pressure potential to low pressure potential.
💡 Hint: Consider the role of concentration gradients in water movement.
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Challenge Problems
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A plant cell has a solute potential of -0.7 MPa and a pressure potential of 0.3 MPa. Calculate the total water potential and predict whether the cell will gain or lose water if placed in a solution with a water potential of -0.5 MPa.
💡 Hint: First calculate Ψ then compare it to the external solution.
If the solute potential of a cell is -2.5 MPa and the pressure potential is 1.0 MPa, describe how this influences the cell's osmotic behavior when placed in pure water.
💡 Hint: Think about how water interacts with different potentials.
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