A spontaneous reaction
Select one:
a. is always exothermic.
b. may be exothermic or endothermic.
c. is always endothermic.
d. does not involve any heat exchange with surroundings.
Which one? Need help please!
A spontaneous reaction Select one: a. is always exothermic. b. may be exothermic or endothermic. c....
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.
If a reaction is exothermic and non-spontaneous at 25 oC and 1 atm pressure, it may be spontaneous at higher temperatures. spontaneous at lower temperatures. endothermic at lower temperatures. endothermic at higher temperatures. nonspontaneous at all temperatures.
If a reaction is exothermic and nonspontaneous at 25C and 1 atm, it may be a. Spontaneous at higher temperatures b. Spontaneous at lower temperatures c. Endothermic at lower temperatures d. Endothermic at higher temperatures e. Nonspontaneous at all temperatures
which one of the following statements is true? A. an endothermic reaction is one in which energy is released from the system into the surroundings B. in an exothermic reaction the products are higher in energy than the reactants C. The total amount of energy in the universe is not a constant D. The change in enthalpy for exothermic chemical reactions is positive E. when energy is released from the system it is absorbed by the surroundings
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
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
A reaction which is exothermic and has an overall increase in entropy is: a. spontaneous only at high T b. spontaneous only at low T c. always spontaneous d. spontaneous in the reverse direction
Type of reaction for the formation of new biological material Select one: a. Exergonic b. Endothermic c. Exothermic d. Endergonic
Calculate \(\Delta \mathrm{H}^{\circ}\) and \(\Delta \mathrm{G}^{\circ}\), using data in Appendix C. Determine whether each reaction is endothermic or exothermic, and spontaneous or nonspontaneous.a) \(\quad 2 P b O(s)+N_{2}(g) \rightarrow 2 P b(s)+2 N O(g)\)b) \(\mathrm{CS}_{2}(l)+2 \mathrm{H}_{2} \mathrm{O}(l) \rightarrow \mathrm{CO}_{2}(g)+2 \mathrm{H}_{2} \mathrm{~S}(g)\)
8) For a reaction with a negative AG value, which of the following statements is always true? A) The reaction is always spontaneous in the forward direction. B) The reaction is always spontaneous in the reverse direction. C) The reaction is always exothermic. D) The reaction is always endothermic. E) AG is always a constant Answer: (