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Dissolving KCl in water made the test tube to get hot. KCl(s) + K(aq) + CI+(aq)...
Sodium reacts violently with water according to the equation: 2 Na(s) + 2 H2O(l) +2 NaOH(aq) + H2(g) The resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of AH° and Asº for this reaction? AH° 0 and AS™ > 0 AH° >0 and AS® < 0 AH° <0 and AS™ > AH° < and AS® < 0
PLEASE SHOW WORK
The standard enthalpy of solution for KCl(s) dissolving in water to form 1 m solution of aqueous K^+ and Cl^- ions, delta H^0 _soln = +17.2 kJ/mol. Using a coffee calorimeter, 0.15 moles of KCl(s) were dissolved in 150 mL of water. The initial water temperature was 25 C. What would be the final temperature? A 4C B 21 C C 25 C D 29 C E 42.2 C
AG°= AH-TAS AG=AGº+RTinQ where R=8.314 J/mol K 1. Calculate AGº for the following reaction at 25 °C if AH°= -1854 kJ/mol; AS°= -236 J/mol K CH-COCH3(g) + 402(g) → 3C02(g) + 3H2O(1) 2. NH.NO, dissolving in water is a spontaneous process. As it dissolves, the temperature of the solution decreases. Based on this, what must the signs (positive or negative) of AG, AH, and AS be?
The salt potassium hydroxide dissolves in water
according to the reaction:
KOH(s) K+(aq)
+ OH-(aq)
(a) Calculate the standard enthalpy change ΔH° for this reaction,
using the following data:
KOH(s) = -424.8 kJ
mol-1
K+(aq)
= -252.4 kJ mol-1
OH-(aq)
= -230.0 kJ mol-1
kJ
(b) Calculate the temperature reached by the solution formed when
8.05 g of KOH is dissolved in
0.162 L of water at 21.8 °C.
Approximate the heat capacity of the solution by the heat capacity...
Predict the sign of ASº for each of the following processes: I 2 K(s) + Cl2(g) – 2 KCl(s) II. CHỊ(g)=C(s)+ 2H2(g) III CaCO3(s) – CaO(s) + CO2(g) Select one: a. negatire, negative, positive b. negative, positive, positive positive, negative, negative d. negative, negative, negative e positive positive, positive
Please help me with these!
Thank you so much.
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QUESTION 14 Sodium reacts violently with water according to the equation: 2 Na(s) + 2 H2001) - 2 NaOH(aq) + H260 The resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of sand for the reaction A AH is negative and AS is negative. B. AH is negative and AS is positive. CAH is positive and AS is negative. D. AH is positive and AS is positive.
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