Question 23 10 pts The entropy change for the reaction ( ASºrxn) shown below is -121.8...
2. Use the thermochemical equations shown below to determine the enthalpy for the final reaction: Nz (e) + 2O2 (g) → N204 (g) AH = ? Using: (1) 2NO2(g) → N2 (g) +202 (8) AH = -66.4 kJ (2) N2O. (g) → 2NO, (e) AH = 57.2 kJ
The standard enthalpy change for the following reaction is 66.4 kJ at 298 K. N2(g) + 2 O2(g) 2 NO2(g) AH° = 66.4 kJ What is the standard enthalpy change for this reaction at 298 K? 1/2 N2(g) + O2(g) — NO2(g) Submit Answer
Consider the following reaction at 298 K. 4Al(s)+3O2(g)⟶2Al2O3(s) Δ?∘=−3351.4 kJ Calculate the following quantities. Refer to the standard entropy values as needed. Δ?sys= J/K Δ?surr= J/K Δ?univ= J/K Al Entropy = 28.3 O2 Entropy=205.2 Al2O3= 50.9
Question 21 0/4 pts What is the entropy change of the surroundings when the reaction below is carried out at 298K under standard conditions? C(graphite) + 2H2(g) → CH4(g) AH° = -74.9 kJ Answer in J/K to three significant figures. red -251 wers Between 241.3 and 261.3
Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: 2NO(g) + O2(g) → 2NO2(g) ΔH°rxn = ? (6 Pts.) Given: N2(g) + O2(g) → 2NO(g) ΔH°rxn = +183 kJ N2(g) + 2O2(g) → 2NO2(g) ΔH°rxn = +66 kJ
3. Predict the sign (positive or negative) on the entropy change for each of these reactions. (a) 2 SO2 (g) + O2 (g) → 2 SO3 (g) Negative (b) 2 NH3 (g) → N2 (g) + 3 H2 (g) (c) CO (g) + 2 H2 (g) → CH3OH (1) 4. For the reaction: 2NO2 (g) + N204 (g) at 298 K, The value of AH° and AS™ are -58.03 kJ and -176.6J/K, respectively. (a) What is the value of AG°...
QUESTION 19 Which of the following acids should be used to prepare a buffer with a pH of 5.9? HOCH2COOH, Ka = 3.5 x 10-4 CICH2COOH, Ka = 1.4 x 10-3 HBrO, Ka = 2.3 x 10-9 C6H13NO4S, Kg = 7.08 x 10-7 HCIO2, Ka = 1.1 x 10-2 QUESTION 20 For the following reaction, N2 (9) + 1/2O2 (g) → N20 (9) At 298 K, AS surr = - 275.34 J/K and ASsys = -74.3 J/K. Which of the...
3. Determine the AH°rxn, AS°rxn, and AGºrxn at 298 K for the reaction below. Balance the reaction first and then calculate AGOrxn in two different ways. NO(g) + O2(g) ---> NO2(g)
Determine AGⓇ rxn for the following reaction at 175 K. T CH 20(g) + 2 H2(g) → CH 4(9) + H2O(g) AH°= -63.9 kJ; AS°= -226.2 J/K O-721.2 kJ -24.3 kJ +519.9 kJ 0 -120.9 kJ 42.2 kJ Determine the sign of AS sys and AS surr for the following chemical reaction. 2 N 2(9) + O 2 (g) → 2 NO 2(9) AH rxn = +2005 KJ O ASsys > 0: ASsurr > 0 O ASsys > 0: ASsurr...
Given the following reactions Question 1 Given the following reactions AH 66.4 k N2 (g)+202 (g)2NO2 (g) 2NO (g)+02 (g) 2NO2 (g) AH=-114.2 k the enthalpy of the reaction of the nitrogen to produce nitric oxide 2NO (g) N2 (g)+02 (g) KJ. is 90.3 180.6 -180.6 47.8 47.8