For which of the following processes would ∆S be negative?
(a) the melting of ice
(b) the freezing of water
(c) the evaporation of a liquid
(d) the breakup of a large molecule into smaller molecules(e) these
all have positive ∆S values
Which of the following reactions would have a negative ∆S°?
(a) H2(g) → 2 H(g)
(b) H2(l) → H2(g)
(c) H2(g) + Cl2(g) → 2 HCl(g)
(d) 2 H2(g) + CO(g) → CH3OH(g)(e) none of the above
Please explain why
For which of the following processes would ∆S be negative? (a) the melting of ice (b)...
1. How much heat is required at constant pressure to melt 1 mole of ice at -25 C to steam at 125° C? boiling point 100c melting point 0.000'C specific heat capacities are gas(steam) 2.08, liquid 4.184 solid (ice) 2.11. All in units of JigC AH(100°C) 40.7 kJ/mol AHu (0.000°C)-6.01 kJ/mol 2. Calculate AHrxn for the reaction: CH4(g)4 Cl2(g) -CC4(g) 4 HCl (g) + Use the following reactions and given AH's: CH4(g) AH =-74.6 kJ 2 H2(g) C(s) C(s)2 Cl2(g)...
Which of the following processes have a ΔS > 0? A) Na2CO3(s) + H2O(g) + CO2(g) → 2 NaHCO3(s) B)CH4(g) + H2O(g) → CO(g) + 3 H2(g) C)CH3OH(l) → CH3OH(s) D)N2(g) + 3 H2(g) → 2 NH3(g) E)All of the above processes have a DS > 0.
For which of the following processes would ?S° be expected to be most negative? Select one: a. H 2 O( l )? H 2 O( s ) b. NH 3 ( g ) + HCl( g )?N H 4 Cl( s ) c. O 2 ( g ) + 2 H 2 ( g )?2 H 2 O( g ) d. N 2 O 4 ( g )?2N O 2 ( g ) e. 2N H 4 N O 3...
1) Which of the following processes would be expected to have the largest increase in ?Srxn per mole of benzene? a) C6H6(l) + Cl2(g) ? C6H5Cl(l) + HCl(g) b) C6H6(l) + 15/2 O2(g) ? 6CO2(g) + 3H2O(g) c) C6H6(s) ? C6H6(g) d) 6H6(s) ? C6H6(l) e) C6H6(l) + 9/2 O2(g) ? 6CO(g) + 3H2O(g) 2) The heat of fusion of acetic acid is 11.5 kJ/mol. Its melting point is 16.6 oC. The change in entropy for the melting of acetic acid in...
Entropy (S) The second factor involved in determining whether or not a process is spontaneous is the change in randomness or entropy (AS). Entropy is represented by the symbol S. Again, experience can help us understand the relationship between entropy and spontaneous processes. If we look at the two drawings below, we can predict which picture represents the stack of marbles "before" and after they are bumped. We expect the stack of marbles (less random, lower entropy) to be the...
hese processes occur spontaneously Which processes or reactions, if any, are classified as irreversible? Snow melting. □ Barium sulfate precipitating from solution. An acid dissolves in aqueous solution. -Fe(s) + 5 CO(g)--Fe(CO)6() -Nico3(aq) + 2 HCl(aq)-NiCl2(aq) + CO2(g) + H2O()
Buckboard quem cumpretrom Icarus. Which one of the following reactions or processes has a negative entropy change? A. BF3(g) + NH3(g) → F3BNH3(5) B. 2 503(g) - 2 SO2(g) + O2(g) C. 2NH4NO3(s) - 2 N2(g) + 4 H2O(g) + O2(g) D. 2 NH3(g) → N2(g) + 3 H2(g) E. H2011) H2O(g)
Which of the following reactions would have the most positive AS° value? A) SO2(g) + Na20(s) – Na,SO3(s) B) CO2(s) — CO2(g) C) Fe3+(aq) + SCN-(aq) — FeSCN2+(aq) D) N2(g) + 3 H2(g) – 2 NH3(g) E) 2 NO(g) + Cl2(g) – 2 NOCI(g)
Name: 1. Indicate whether the following processes are spontaneous or nonspontaneous. (a) Liquid water freezing at a temperature below its freezing point (b) Liquid water freezing at a temperature above its freezing point (c) The combustion of gasoline (d) A ball thrown into the air (e) A raindrop falling to the ground (f) Iron rusting in a moist atmosphere 2. Predict the sign of the entropy change for the following processes. (a) An ice cube is warmed to near its...
(a) In a chemical reaction a solid decomposes to form two different gases. Would you expect DS to be positive, negative, or close to zero for this reaction? DS for this reaction should ---Select--->> be positive, be negative, or be close to zero . (b) In which of the processes described below should the entropy increase? Choose all of the correct possibilities. ice cubes melting at -5 oC and 1 atm pressure breakdown of large molecules into smaller ones during digestion...