Question 5 1 pts Which of the following is true of an exothermic reaction? Strong bonds break and weak bonds form: this...
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
Question 8 (4 points) Formation of NO from nitrogen and oxygen is an endothermic process. Which of the following statements is true about the bonds that are broken and formed during this reaction? N2(g) + O2(g) 2NO (g) More energy is invested to break the bonds than the energy released when bonds are formed Less energy is invested to break the bonds than the energy released when bonds are formed More energy is invested to form the bonds than the...
Question 1 2 pts Strong cultures are always better than weak cultures. O True O False
Question 5 1 pts 5. Which of these is a strong acid that ionizes to make a weak acid? HCI HNO3 H3PO4 H2503 H2504
If the enthalpy of solution in water is exothermic which of the following MUST be true: The energy required to form solvent-solute interactions is small. OA Adding heat to the solution will increase the solubility of the solute. ОВ. The energy required to break solvent-solvent interactions is small. Ос. The solute is a gas. OD The enthalpy change from forming solute-solvent interactions is greater than the enthalpy changes from breaking solvent-solvent and breaking solute-solute interactions combined. OE.
1.5 pts Question 3 Which of the following statements is INCORRECT? Strong electrolytes are much more soluble in water than weak electrolytes. Allionic compounds that are soluble in water are considered strong electrolytes. Nonelectrolytes are soluble molecular compounds. The extent to which an electrolyte dissolves in solution does not indicate whether it is strong or weak. None of the above statements is incorrect.
Which is true for the following titrations. Question 3 options: 123 The titration of a strong base using a strong acid. 123 The titration of a weak base using a strong acid. 123 The titration of a weak acid using a strong base. 1. The pH at the equivalence point is approximately equal to 7.0. 2. The pH at the equivalence point is less than 7.0 3. The pH at the equivalence point is greater than 7.0. Question 4 (1...
Which of the following statements is FALSE? A. The heat of reaction is the amount of heat absorbed or released during a reaction that takes place at constant pressure. B. A change of energy occurs as reactants interact, bonds break apart, and products form. C. Enthalpy change is the difference in the energy of the products and reactants. D. The change in enthalpy is found by subtracting the enthalpy of the products from the enthalpy of the reactants.
2 pts Question 14 Consider the reaction 2H2(g) + O2(g) → 2H2O(l) AH = -286 kJ Which of the following is true? The reaction is exothermic The reaction is endothermic The reaction is neutral with respect to energy change Heat is absorbed by the system Information is not enough to tell about the energy change
QUESTION 16 Which one is paramagnetic? Liz B2 H2 No answer QUESTION 17 Select the statement that does not describe properly for this reaction: H2º(s) --> H20(1) AH = +6.01 kJ This reaction is endothermic and heat gets absorbed by the system from the surrounding. The temperature of the surrounding would decrease as a result of this reaction. The reverse reaction is exothermic and releases heat to the surrounding from the system. Liquid water is more stable than solid water...