We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
The combustion of octane is an exothermic reaction. Which statement is true for an exothermic reaction?...
Which of the following is true regarding endothermic and exothermic reactions? a reaction which releases energy is exothermic areaction which absorbs energy is endothermic in an exothermic reaction, heat is released in an endothermic reaction, heat is absorbed all of the above are true Oonly a andc are true only b and d are true
8. Indicate whether the following statements are true or false: a. If the free energy,AG,ofareaction is negative, then the entropy,AS,must be positive b. Anendergonicreactionisone forwhichAGispositive. c. Increasing the temperature usually increases the rate of a chemical reaction because it increases rate of movement of molecules d. A reaction that releases heat (ΔH) is termed exothermic, while a reaction that releases free energy, Δ G, is termed exergonic e. The transition state of a reaction is always at a higher (unfavorable)...
14. Which of the following statements is NOT true about exothermic reactions? AH = negative Occurs in combustion reactions Heat is released and appears in Joules or kJoules on the product side of the reactie Energy of products > Energy of reactants
Which statements are true? Δ?ΔH for an exothermic reaction is positive. When energy is transferred as heat from the surroundings to the system, Δ?ΔH is negative. When energy is transferred as heat from the system to the surroundings, Δ?ΔH is negative. The evaporation of water is an exothermic process. Δ?ΔH for an endothermic reaction is positive. A combustion reaction is exothermic.
I selected the second answer and it was
incorrect.
QUESTION 2 Which is true of a free energy diagram for an SN2 reaction? 0 It includes a carbocation intermediate. 0 It includes intermediates that are higher in energy than reactants or products. o It includes one transition state. o It always shows that the reaction is net exothermic. 0 The reactants are always found at a lower energy than the products.
pre lab- heat of combustion (1-3D)
Experiment 10 HEAT OF COMBUSTION Pre-Lab 1. The Law of Conservation of Energy can be applied to combustion processes where fuel + oxygen products + energy The total chemical energy associated with the reactants must be the same as the total chemical energy of the products when the heat of combustion is included. a) Underline the graph which best represents the relationship between the stored chemical energy of the reactants and products in a...
Question 12 (5 points) (12) For an acid - base neutralization reaction, which statement is true? (b) It absorbs heat, and is exothermic. (a) It releases heat, and is exothermic. (c) It releases heat, and is endothermic (d) It absorbs heat, and it is endothermic. Question 13 (7 points) (13) In an acid-base reaction, 1 M of 100 ml. HCl(aq) is used to react with NaOH (aq). What is the mole number of HCI used? O(a) 1 mole (b) 0.1...
12. Which statement is always true for an exothermic reaction? A) The enthalpy change is negative. B) The reaction absorbs heat from the surroundings. C) The enthalpy change is positive. D) The work done on the system is zero
10. Select the correct statement. A) In an exothermic reaction, the surroundings releases heat. B) If the sign of w is negative, the reaction is always exothermic. C) If ΔE is negative, the reaction is always exothermic. D) When the surroundings gains heat, the reaction is exothermic.
Which of the following is a true statement relating reaction rates? Select one: O a. the higher the concentration of reactants, the lower the reaction rate O b. calatyst increases reaction rate by increasing activation energy c. inhibitors decrease reaction rate d. temperature does not affect reaction rates