ANS-
Define energetically unfavorable
reactions-[Macromolecules broken down via hydrolysis
Increase in energy by going from high energy to low energy (energy
release)]
Many energetically unfavorable reactions in cells are coupled to the hydrolysis of the molecule ATP. The breakdown of ATP to ADP is a highly energetically favorable reaction that releases energy. This energy is then used to carry out the unfavorable reaction.If ΔG < 0, this reaction will proceed in the forward direction, as written. If ΔG > 0, however, the reaction will proceed in the reverse direction and B will be converted to A. The ΔG of a reaction is determined not only by the intrinsic properties of reactants and products, but also by their concentrations and other reaction conditions (e.g., temperature). It is thus useful to define the free-energy change of a reaction under standard conditions. (Standard conditions are considered to be a 1-M concentration of all reactants and products, and 1 atm of pressure). The standard free-energy change (ΔG°) of a reaction is directly related to its equilibrium position because the actual ΔG is a function of both ΔG° and the concentrations of reactants and products THANK YOU VERY MUCH ,HOPE THIS WILL HELP YOU .GOOD LUCK
5. How can a chemical reaction that is energetically unfavorable under standard conditions (AG"'>0) occur in...
1. How can a chemical reaction that is energetically unfavorable under standard conditions occur in a cell? 2. Draw the structures of glucose and fructose in the open-chain and closed-ring conformations.
Question 4 30 pts How can a metabolic pathway contain an energetically unfavorable reaction yet still occur? The free-energy changes of the individual steps in a pathway are summed to determine the overall free-energy change. [Choose] TRUE FALSE [Choose] A step in a pathway that is energetically unfavorable can be driven by coupling it to a thermodynamically favorable reaction. [Choose ] At equilibrium, very few "energetically unfavored" products might be present - but if these unfavored products are then being...
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rxn < 0 b) AS rxn > 0 c) AGºrx < 0 d) Both a and c e) Both b and c
4) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rxn <0 b) AS nu>0 c) AGO < 0 d) Both a and c e) Both b and c
Consider the cell below operating spontaneously under standard conditions at 25°C salt bridge Ag Mn2 (1M) Ag (1M) Which electrode is the anode of the cell? Mn What is the value of the standard potential for the spontaneous reaction occurring as the cell operates? what is the value of the standard free energy change, AG", (in kJ) for the spontaneous reaction occurring in the cell? kJ Check
8. In glycolysis, Step 6: The Oxidation of Glyceraldehyde-3-Phosphate is thermodynamically unfavorable under standard conditions. To "pull" the reaction forward, Step 6 is coupled with Step 7: The 1st Production of ATP. What is the meaning of the term coupled? Calculate the overall AG" for Steps 6 and 7.
3) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS rx > 0 b) AS rx c) AGºrx < 0 d) Both a and c e) Both b and c
urgent 3) For a chemical reaction to be spontaneous for standard conditions, which of the following must be true? a) AS r> 0 b) AS m 0 c) AGºrx < 0 d) Both a and e) Both b and c
please show work Balance the chemical equation for the following redox reaction under basic aqueous conditions with the smallest whole-number coefficients possible using the half-reaction method. How many moles of electrons are transferred in the balanced reaction? N, 0(g) + C10,- (aq) → CIO" (aq) + NO, (aq) d. 18 b. 6 e. 24 c. 12 a. 4 Calculate AG" for an electrochemical cell reaction that occurs under acidic aqueous conditions based on the following two half-reactions for which the...
Balance this skeleton reaction using the half reaction method, under basic conditions. 26. & 27. CIOs(aq) + B(s)-> Cl2(g) + B(OH)3(aq) What is the coefficient for the OH, and is it reactant or product in the final equation? What is the coefficient for the H20, and is it reactant or product in the final equation? a. b. 28. & 29. The oxidation-reduction reaction 3 Ag+(aq) + Cr(s)-> 3 Ag(s) + Cr3+(aq) has E%HF 154 V. a. Calculate the value of...