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Predict what would happen to plant and animal cells

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Unformatted text preview: Predict what would happen to plant and animal cells placed in 0.0M and 4.0M concentration solutions. 0.0M solution = the animal cell would swell and lyse from the pressure since the cell will be unable to reach equilibrium. The plant cell will swell and generate turgor pressure as the plasma membrane presses against the cell wall. 1.0M solution = the animal cell would shrivel. Plasmolysis will occur to the plant cell. The plasma membrane will pull away from the cell wall. Δ G = Δ H - T Δ S What is Entropy? = a measurement of Disorder/randomness When Δ S is positive this means there is MORE Disorder/randomness When Δ S is negative this means there is LESS Disorder/randomness What is Δ H? = a measurement of ENTHALPY (change in total energy) What is Gibbs Free energy? = The portion of a system’s energy that can perform work. A measurement of SPONTANEITY When Δ G is positive this means The reaction is endergonic. Energy is consumed and therefore required. Decreases Entropy since you are generating order. Reactions are never spontaneous. Anabolic reactions When Δ G is negative this means The reaction is exergonic. Energy is released. Entropy increases (less order). The reaction is spontaneous. Catabolic reactions Δ G (Joules) Δ H (Joules) T (Kelvin) Δ S (J/K) -500 1000 300 5 -400 1100 300 5 -300 1200 300 5 -200 1300 300 5 -100 1400 300 5 0 1500 300 5 100 1600 300 5 200 1700 300 5 300 1800 300 5 400 1900 300 5 What happens to Δ G when Δ H goes up ? WHY? Δ G INCREASES when Δ H INCREASES. This happens because the reaction needs more and more energy to occur (more endothermic), and therefore will not happen as spontaneously. What happens to Δ G when Δ H goes down ? WHY? Δ G DECREASES when Δ H DECREASES. This happens because the reaction needs less and less energy to occur (more exothermic), and therefore becomes more and more likely to happen spontaneously. Δ G Δ H T Δ S 200 1700 300 5 150 1700 310 5 100 1700 320 5 50 1700 330 5 0 1700 340 5 -50 1700 350 5 -100 1700 360 5 -150 1700 370 5 -200 1700 380 5 -250 1700 390 5 What happens to Δ G when T goes up ? WHY? Δ G DECREASES when T INCREASES. AN INCREASE IN TEMPERATURE INCREASES KINETIC ENERGY OF MOLECULES MAKING IT MORE LIKELY THAT COLLISIONS AND REACTIONS WOULD TAKE PLACE. What happens to Δ G when T goes down ? WHY? Δ G INCREASES when T DECREASES. AN DECREASE IN TEMPERATURE DECREASES KINETIC ENERGY OF MOLECULES MAKING IT LESS LIKELY THAT COLLISIONS AND REACTIONS WOULD TAKE PLACE. Δ G Δ H T Δ S 6000 7500 300 5 4500 7500 300 10 3000 7500 300 15 1500 7500 300 20 0 7500 300 25 -1500 7500 300 30 -3000 7500 300 35 -4500 7500 300 40 -6000 7500 300 45 -7500 7500 300 50 What happens to Δ G when Δ S goes up ? WHY? Δ G DECREASES AS Δ S INCREASES. AS DISORDER INCREASES (SINCE THAT IS THE NATURAL TENDANCY OF PROCESSES) SPONTANEITY WILL ALSO BECOME MORE LIKELY....
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Predict what would happen to plant and animal cells placed...

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