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800 ASE positive AS negative AH = no change ΔΗ = positive Show transcribed image text
The
answer choices for both diagrams are: no change, negative, or
positive.
Determine the signs of the changes in entropy, AS, and enthalpy, AH, for the physical changes. Assume a closed or isolated system. -> 8 80 AS AH ASE AH
18 Question (3 points) What combinations of positive or negative AH and positive or negative AS can indicate a spontaneous reaction? 5th attempt See Periodic Tab Choose one or more: D-AH,+A5 +AH-AS D-AH-AS DAH+AS 25 OF 29 QUESTIONS COMPLETED < 18/29 > + VIEW SOLUTION
For the following example, identify the following. H2O(l) + H2O(g) a negative AH and a positive AS a positive AH and a positive AS It is not possible to determine without more information. a positive AH and a negative AS O a negative AH and a negative AS
44" What is the sign of ΔΗ (system) and AS (system) if a chemical reaction is spontaneous at all temperatures under stan conditions? a. AH (system) is negative, and ΔS (system) is positive. b. AH (system) is negative, and AS (system) is negative. C. AH (system) is positive, and AS (system) is positive. d. AH (system) is positive, and AS (system) is negative. e. none of these 45. For which of the following reactions will the entropy of the system...
A process has a negative AH and a positive AS. Which of the following is true? the process is spontaneous at all temperatures the process isnon-spontaneous at all temperatures the process is spontaneous at high temperatures the process is spontaneous at low temperatures For a reaction in which AG is large and positive, which is true? AG is large and positive AG is large and negative Ο ΔG = ΔG none of these can be assumed
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option observations conclusions reaction ΔΗ is (pick one) The reverse of this reaction is always spontaneous. A As is (pick one) This reaction is spontaneous except below ΔΗ is (pick one) 38. °C but proceeds at a...
Calculate the change in enthalpy for the following reaction:
Given the following thermochemical equations: AH,370 kJ ΔΗ,--180 kJ AH,230 kJ Calculate the change in enthalpy for the following reaction: Number kJ
Consider a reaction that has a positive AH and a negative As. Which of the following statements is TRUE? a. This reaction will be spontaneous only at high temperatures. b. This reaction will be spontaneous at all temperatures. c. This reaction will be nonspontaneous at all temperatures. d. This reaction will be nonspontaneous only at high temperatures. e. It is not possible to determine without more information.
For the following example, identify the following. H2O(0) - H2O(s) O a negative AH and a positive AS O a positive AH and a negative AS O a positive AH and a positive AS O a negative AH and a negative AS It is not possible to determine without more information. Submit Request Answer
Verizon LTE 10:41 PM Done 2 of 2 Instructions ach question carefully and choose the correct answer Question 2 2 pts What is the change in heat when 2 moles of NO reacts according to the following equation? 2NO(g) + 02(g)-+2NO2(g) ΔΗ -1 14.6 kJ ○ +229.2k) ○ +114.6k) 229.2 k 114.6k Next » Question 1 2 pts When an ice cube melts to form liquid water, is the change in enthalpy of the ice cube (the system) positive or...