Practice Problem BUILD
(a) Calculate
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Chemistry
- Chemistry Find ΔHfus for water Mass of cup and warm water: 45.67 gFinal mass of cup, water, and melted ice: 69.76 gMass of empty cup: 2.21 gTemperature of warm water: 63 °CTemperature of ice: 0 °CTemperature at equilibrium: 45.2 °Carrow_forward#5 Be sure to answer all parts. Determine Δngas for each of the following reactions: (a) MgCO3(s)→MgO(s) + CO2(g) =____mol (b) 2 H2(g) + O2(g)→2 H2O(l) =____mol (c) HNO3(l) + ClF(g)→ClONO2(g) + HF(g) =____molarrow_forwardWhat is equal to zero at 298 K? A) ΔrH° (F, g) B) S° (F, g) C) S° (F2, g) ΔrH° (F2, g)arrow_forward
- QUESTION 22 At what temperature, in Kelvin, does the following reaction change from spontaneous to non-spontaneous 2 A (aq) + 2 B (aq) 2 C (aq) + 1 D (aq) if AH° (A)= 0.8219 kJ/mol, AH° (B) = -40.5308 kJ/mol, AH° (C) = -85.3178 kJ/mol, and AH (D) = -70 8643 kJ/mol AS (A)= 76.117 J/(mol K), AS (B) = -15.8072 J/(mol K), AS (C) = 18.4425 J/(mol K), and AS" (D) = -8.6387 J/(mol K)arrow_forwardCalculate the AS°rxn of the following reaction at 223°C and standard pressure. 1st attempt O See Hint C,H,(8) + 30,(g) . 200,(g) + 2H,0(g) AH°f, kJ/mol S°, J/mol K AG°F, kJ/mol C2H4(g) 52.3 219.5 68.1 O2(g) 205.0 CO2(g) -393.5 213.6 -394.4 H20(g) -241.8 188.7 -228.6 J/mol Karrow_forward5H. Based on the following practice problem, if either of the reactions is nonspontaneous but can become spontaneous, at what temperature might it become spontaneous? Round your answer to 2 significant digits.arrow_forward
- Which of the following relationships is (are) correct? (Select all that apply.) DG > 0 represents a spontaneous process DG 0 represents an increase in kinetic energyarrow_forwardFor a reaction with ΔH = 5.2767 kJ/mol and ΔS = 18 J/K•mol, at 20°C, the reaction is: Spontaneous Not Spontaneous At equilibrium. Please type answer note write by hend.arrow_forwardConsider the equilibrium: 2NO2(g) <--> N2O4(g). Calculate ΔGo for the reaction given that the ΔHo = -58.03 kJ/mol and the ΔSo = -176.6 J/K at 100°C (A)-75.7 kJ/mol (B)7.84 kJ/mol (C)-124 kJ/mol (D)-40.4 kJ/molarrow_forward
- Choose the reactions (or processes) that are expected to have a negative value for AS°. (Select all that apply.) O co(g) +202(g) → CO2(g) O SiF (aq) + H2(g)→ 2HF(g)+ SiF4(g) O 1(8)2(s) O 02(g) + 2SO2(g) → 2SO3(g) U 2H;O2(aq) → 2H2O(g)+ O2(g)arrow_forward1st attempt l See Periodic Table See Hint Using the appropriate thermodynamic values in the table below, calculate the lowest temperature at which the reaction is spontaneous under standard conditions. Compound AGf(kJ/mol) AHF(kJ/mol) S(J/mol K) H20(g) -228.6 -241.8 188.8 H20(4) -237.2 -285.8 69.9 C(s) 0.0 0.0 5.7 H2lg) 0.0 0.0 130.6 Co(g) -137.2 -110.5 197.7 O2(g) 0.0 0.0 205.0 Karrow_forwardSubstance X has a heat of vaporization of 55.4 kJ/mol at its normal boiling point (423°C). For the process X(l) → X(g) at 1 atm and 423°C, calculate the value of ΔG . Question 23 options: A) 79.6 J/K•mol B) –79.6 J/K•mol C) 0 D) 103 J/K•mol E) –103 J/K•molarrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning