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Minimum gibbs free energy is NOT attained by a semipermeable membrane. True or false?
Sim Bear
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What is force energy?
The minimum energy required for molecules to react.
Does osmosis use energy?
No, it moves water across a partially permeable membrane (cell membrane) from an area of high concentration to an area of low concenration without energy
Can molecule have zero vibrational energy?
No. From what I understand, the Uncertainty Principle won't allow this - so even at absolute zero (a temperature that can't really be achieved 100%), there will still be some vibrational energy left.
How do things gain heat?
Heat in a body is attained when there is rapid movement in the molecules of a body or when there is kinetic energy in the body.
What is the minimum amount of energy required for two substances to react?
The minimum amount of energy needed is called the "activiation energy". It varries depending on factors such as your reaction, temperature and several others.
What is it when a molecule uses energy to move across a semipermeable membrane?
active transport
The rate of diffusion through a semipermeable membrane will be lowest when?
The rate of diffusion through a semipermeable membrane will be lowest when temperatures are low. Lower temperatures decrease the energy of the molecules, which in turn decreases the rate of diffusion.
What is essential for diffusion?
A- A Concentration Gradient B- A Selectively Permeable Membrane C- A Source of Energy D- A Protein The Answer Is (A) Diffusion can occur without a semipermeable membrane, as diffusion is simply movement of a substance from high to low concentration. A source of energy is needed only for active transport. Proteins are needed if the the particles transported are too big to pass the semipermeable membrane.
what is exact definition of osmosis?
Osmosis is the movement of water across a semipermeable membrane from a higher concentration of water to a lower concentration of water without the use of energy.
Movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called?
facilitated diffusion.
The diffusion of water across a semipermeable membrane is called?
When water diffuses through a semipermeable membrane, such as a cell, it is called osmosis. In osmosis the concentration of water will differ on one side of the membrane from that of the other side. Water molecules will tend to diffuse from the high concentration side to the lower.
How does the Concentration gradient of a substance affect the movement of that substance and the expenditure of energy?
The larger the concentration gradient (bigger difference between the two solutes across semipermeable membrane) the faster the rate of diffusion.
What type of molecule movement consist on one way diffusion across a semi permeable membrane?
The movement of molecules across the semipermeable membrane follows the law of diffusion. Thus, the molecules of a substance move from their higher concentration towards their lower concentration by their own kinetic energy.
How does osmosis form?
Osmosis is a physical process in which a solvent moves, without input of energy, across a semipermeable membrane (permeable to the solvent , but not the solute) separating two solutions of different concentrations. Osmosis releases energy, and can be made to do work, as when a growing tree root splits a stone.
What is the role of thermal energy in osmosis?
The speed of an osmotic transfer can increase as temperature increases. An increase in thermal energy will increase the movement of molecules both in the liquids, and of the semipermeable membrane, resulting in an increased flow. An increase in thermal energy may also lower the viscosity of a liquid, increasing it's rate of flow.
What is it called when a molecule uses energy to move across a semipermeable?
active transport
What is the term for the diffusion of water across the semipermeable membrane?
The term for the diffusion of water across a semipermeable membrane is osmosis. Osmosis is when the molecules of a solvent move from a less concentrated solution to a more concentrated one. This equalizes the concentrations on each side of the member.
