Predict whether an increase or decrease in entropy occurs at constant temperature:
NH3 (g) + HCl (g) -------> NH4Cl
C12H22O11 (s)
--------> C12H22O11 (aq)
2H2 (g) + O2 (g) --------->
2H2O (g)
Predict whether an increase or decrease in entropy occurs at constant temperature: NH3 (g) + HCl...
22. Choose the process(s) that lead(s) to an increase in entropy of the system. Treat all gases as ideal. A) The pressure of 1 mole of Oz is doubled through compression at a constant temperature. B) CO2 is expanded to 10x its original volume. C) A glass of water cooling down to a lower temperature. D) NH3(g) + HCl(g) → NH4Cl(s) E) 2H2(1) + O2(1) → 2H2O(g)
7. Which of the following reactions would have a positive value f I. NH3(g) + HCl(g) → NH4Cl(s) 11. Ag+(aq) + Cl-(aq) → AgCl(s) 111, 2H2(g) + O2(g) → 2H2O(g) IV. CakhoBT2 (l) → C6H10 (l) + Br2 (1) V. 2H2O2(g) → 2H2O(g) + O2(g) a). I and II b). I and III c). II and III d). II and IV e). IV and V
Predict whether there is an increase or decrease in the system's entropy during each of the processes given below. (a) 2 Na(s) + Cl2(g) → 2 NaCl(s) increasedecrease (b) Cl2(g) → Cl2(l) increasedecrease (c) C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) increasedecrease
for which of these an increase in entropy? a. caco3(s)-> Cao(s)+ co2(g) b. Nh3(g)+ Hcl(g)-> nh4cl(s) c. h20(g)-> h20(l) d.2no2(g)-> n202(g)
Question 14 Which reaction is accompanied by an increase in entropy? A. Ba(OH)2(s) + 2 HCl(g) → BaCl2.2H2O(s) B. C12H20() + 17 O2(g) - 12 CO2(g) + 10 H200) OC. NH4Cl(s) → NH3(g) + HCl(g) OD.2 C2H2(g) + 5 O2() → 4 CO2() + 2 H2O(s) E. (CH3)2CO(l) + 4 O2(g) + 3 CO2(g) + 3 H2011)
State the sign of ΔS in each of the following processes: HCl (g) + NH3 (g) → NH4Cl (s) 2 SO2 (g) + O2 (g) → 2 SO3 (g) The cooling of N2 gas from 20 °C to -50 °C. My answer is that all 3 are negative. (a) solids have less entropy than gases, so the gases forming a solid would decrease entropy. (b) A decrease in the number of gas molecules would decrease the entropy. (c) A decrease...
2. Indicate whether the following reactions show an increase or decrease in entropy. 2 KClO3(s) → 2KCI(s) + 302(g) on H20() → H20(5) N2(g) + 3H2(g) → NH3(g) NaCl(s) → Na+(aq) + Cl-(aq)
Based on a simple inspection of the following reactions, state whether entropy would increase (1) or decrease (1) and briefly state why. a)Br2(g)>2Brg) b) 2Mg(s) + O2(g) >2MgO (9) c) NH4Cl → NH4+ (aq)+ Cl(aq) d) CaO + H2O + Ca(OH2(s) e) 2NaCl → 2Na(1) + Cl2()
Consider the reaction: NH4Cl(aq)NH3(g) + HCl(aq) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 1.81 moles of NH4Cl(aq) react at standard conditions.
Which reaction is accompanied by an increase in entropy? A. (CH3)2CO() + 4 O2(g) → 3 CO2(g) + 3 H2011) B. Ba(OH)2(s) + 2 HCl(g) → BaCl2.2H2O(s) OC.C12H20() + 17 O2(g) → 12 CO2(g) + 10 H2O() D. NH4Cl(s) + NH3(g) + HCl(g) E. 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(s)