What is free energy? What is its symbol?
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Refer to Model 10.1 and answer the question that follows
- What is free energy? What is its symbol?
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- Activity 6.3: First Law of Thermodynamics Procedure: If you do not know, you can ask someone to help you explain the mechanism behind each situation. Situation Mechanism behind… 1 A battery will sometimes explode when overheating. Process Questions: What does it mean when the statement says “heat energy cannot be created nor destroyed”? ________________________________________________________________________________________________________________________ How will you express the 1st Law of Thermodynamics in your own words?_________________________________________________ ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Explain what is happening in this photo in terms of kineticenergy and potential energy. Include the energy conversionsthat occur when the penguins eat fish and climb back upon the glacier. Describe the role of ATP and enzymes in theunderlying molecular processes, including what happens tothe free energy of some of the molecules involved.Regarding the reasoning for the Michaelis-Menten equation to be unsuitable for accurate analysis of experimental data, select all that apply: It is nonlinear It is only valid for reactions at equilibrium It is not valid under experimental conditions Extrapolation to Vm is inaccurate and therefore Km also cannot be accurately described
- Which statements are true and which are false? Modify each false statement so that it reads correctly. a. In a closed system, neither energy nor matter is exchanged with the surroundings. b. State functions are independent of the pathway. c. A process is isothermic if ΔH = 0. d. The sign and magnitude of ΔG give important information about the direction and rate of a reaction. e. At equilibrium, ΔG = ΔG°. f. For two reactions to be coupled, they must have a common intermediate.Which statements concerning free energy change are true?a. Free energy change is a measure of the rate of a reaction.b. Free energy change is a measure of the maximum amountof work available from a reaction.c. Free energy change is a constant for a reaction under anyconditions.d. Free energy change is related to the equilibrium constantfor a specific reaction.e. Free energy change is equal to zero at equilibrium.Reaction 25.2 Glucose (aq) + PO43- (aq) ⇄ Glucose-PO43- (aq) Reaction 25.2 is nonspontaneous and very slow. Use this information to sketch a reaction diagram for Reaction 25.2. Clearly label the x axis, y axis, products, reactants, and activation energy.
- Suggest an appropriate reason for the observation : “On increasing temperature of the reacting system by 10 degrees, the rate of reaction almost doubles or even some times becomes five folds.”Consider the generic reaction2A+3B→2C,ΔHrxn=−100kJIf a reaction mixture initially contains 5 mol of A and 6 mol of B, how much heat (in kJ) will have evolved once the reaction has occurred to the greatest extent possible? 150kj 200kj 300kj 100kJENZYME CATALYSIS lab Construct a hypothesis addressing the effect concentration will have on rate of reaction. What chemical reaction is being catalyzed in the experiment? Label the substrate(s), enzyme and product(s).
- Entropy increase A) with every reaction B) only in open systems C) only under certain reaction conditions D) only in the physical world. This cannot happen in cells otherwise cells would lose their needed energy1a-Enzymes serve as catalysts for chemical reactions. What does this mean? Select all that apply. Select one or more: a. Enzymes make reactions more likely to occur. b. Enzymes increase the activation energy. c. Enzymes decrease the free energy (?G) of a reactio d. Enzymes increase the free energy (?G) of a reaction. 1b-When ATP is hydrolysed: Select one: a. The energy will be released as heat if the reaction is not coupled to a substrate, b. The potential energy associated with the resulting ADP molecule increases. c. The terminal phosphate is transferred to a substrate, lowering the potential energy of the substrate d. Water is formed and released as a reaction product.Figure 6.8 Look at each of the processes shown, and decide if it is endergonic or exergonic. In each case, does enthalpy increase or decrease, and does entropy increase or decrease?
