Hydrogen peroxide (H,O2) decomposes according to the equation H,O,(1) → H,O() + (1/2)0,(g). Calculate K, for this reaction at 25°C. (AH = -98.2 kJ/mol, AS° = 70.1 J/K • mol, R= 8.314 J/K • mol) 3.46 x 1017 O 8.6 x 104 1.3 x 10-21 7.8 x 1020

A student dissolves 12.3 g of potassium chloride (KCI)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water fall from 22.0 °C to 19.6 °C over the course of 5.9 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: olo Ar KCI(s) K* (aq) + CI (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. exothermic Is this reaction exothermic, endothermic, or neither? endothermic neither If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. |kJ kJ Calculate…

please help?

What is AG for the reaction l2(g) → 2 1(g) at 25.0 °C if K = 6.1 x 10-2²? (R = 8.314 J/mol.K)

At -8.64 °C the concentration equilibrium constant K = 7.7 for a certain reaction. Here are some facts about the reaction: -1 • The initial rate of the reaction is 5.3 mol·L¯¹·s¯¹. . If the reaction is run at constant pressure, 132. kJ/mol of heat are absorbed. • The constant pressure molar heat capacity C = 2.97 J'mol K¹. Yes. Using these facts, can you calculate K at 16. °C? x10 O No. If you said yes, then enter your answer at right. Round it to 2 significant digits. If you said no, can you at least decide whether Kat 16. °C will be bigger or smaller than K at -8.64 °C? C Yes, and K will be bigger. Yes, and K will be smaller. No.

Calculate the standard enthalpy change for the reaction at 25 ∘C. Standard enthalpy of formation values can be found in this list of thermodynamic properties. 2CH3OH(g)+3O2(g)----> 2CO2(g)+4H2O(g)

Calculate the standard change in Gibbs free energy for the reaction at 25 °C. Standard Gibbs free energy of formation values can be found in this table. 3 NO₂(g) + H₂O(1) AGixn || - 2 HNO3 (1) + NO(g) kJ/mol

The reusable booster rockets of the space shuttle use a mixture of aluminum and ammonium perchlorate as fuel. A possible reaction is 3A1(s) + 3NH, Cl0,(8) → Al, O, (s) + AICI; (s) + 3NO(9) + 6H2O(g) Calculate AH° for this reaction. Substance and State AH ° (kJ/mol) Al(s) Al2 O3 (s) AICI3 (s) H2O(g) NO(g) NH, CIO4 (s) -1676 -704 -242 90. -295 AH° = kJ

Consider the reaction. 2 Fe,O, 4 Fe + 30, AHn = +824.2 kJ The formation of 84.0 g of Fe results in the absorption of 3.10 x 102 kJ of heat. the absorption of 17300 kJ heat. the absorption of 1240 kJ of heat. the release of 1240 kJ of heat. the release of 3.10 x 10² kJ of heat. the release of 17300 kJ of heat. G Search or type URL