A 2.82 kg cast iron pan is heated to some temperature, T;, and subsequently quenched in 3.5 gallons (approximately 13.25 L) of mineral oil at 21.2 °C to harden the cast iron. The system reaches an equilibrium temperature of 74.4 °C. What was the initial temperature (in °C) of cast iron pan? (Cs,iron = 0.460 J g°C; Cs,oil = 1.67 J g °C-1; doil = 0.850 g mL) -1 o

Identify the reactions that are exothermic. ) Multiple answers: Multiple answers are accepted for this question Select one or more answers and submit. For keyboard navigation... SHOW MORE V C(graphite)C(diamond) AH° = 2 kJ b. CaCO3 (s) CaO(s) + CO2(g) AH° = 178 kJ CuO(s) + H2 (g) → Cu(s) + H2 0(g) AH° = -85 kJ 2H2 (g) + 02(g) - 2H20(g) AH = -484 kJ 3H2 (g) + N2(g) 2NH3 (g) AH - 92 kJ Unanswered

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…

Ammonia (NH3) decomposes to form nitrogen gas and hydrogen gas with an enthalpy of 89.4kJ/mol. Aclosed container is charged with 6.0 atm ammonia and heated to 25.0°C. At equilibrium the pressure of H2 is3.60atm. a. Write the balanced reaction.

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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)

What is AGxn (in kJ) at 1932 K for the following reaction? 2POCI3(g) → 2PC13(g) + O₂(g) POCI3(g): AH = -592.7 kJ/mol and Sº = 324.6 J/K mol) PC13(g): AH = -287.0 kJ/mol and So = 311.7 J/K mol) O₂(g): AH = ? kJ/mol and Sº = 205.0 J/K mol)

Complete the mechanism of addition of HCl to propene below. Please use curved arrows to indicate the electron(s) movements

Consider the reaction in the Haber process 3H2 (g) + N2 (g) → 2NH3 (g)where delta H° = -91.8 kJ/mol and delta S° = -197 J/(mol*K). What is the value of the equilibrium constant (K) at a temperature of 125°C?