QUESTION 24The standard enthalpy of formation of gaseous H20 at 298 K is -241.82 kJ/mol. What is the AH at 373 K given the following values of the molarheat capacities at constant pressure?H20(g) = 33.58 J K-1 mol-1; H2(g) = 29.84 J K-1 mor1; 02(g) = 29.37 J K-1 mol"1H2(g) + % 02(g) – H20(g)O -121.3 kJ/mol-485.2 kJ/mol-286.4 kJ/molO -242.6 kJ/mol

Given reaction is H2 (g) + 1/2 O2 (g) --> H2O (g) molar heat capacity…

Answered: The standard enthalpy of formation of…

Science

Chemistry

The standard enthalpy of formation of gaseous H20 at 298 K is -241.82 kJ/mol. V heat capacities at constant pressure?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

A generic solid, X, has a molar mass of 77.577.5 g/mol. In a constant‑pressure calorimeter, 23.323.3 g of X is dissolved in 297297 g of water at 23.00 °C. X(s)⟶X(aq) The temperature of the resulting solution rises to 29.5029.50 °C. Assume the solution has the same specific heat as water, 4.184 J/(g·°C), and that there is negligible heat loss to the surroundings. How much heat was absorbed by the solution? q= kJ What is the enthalpy of the reaction? Δ?rxn=. kJ/mol
A scientist measures the standard enthalpy change for the following reaction to be 6.7 kJ : CO(g) + H,O(1)–CO;{g) + H2(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CO(g) is kJ/mol.
Measurements show that the energy of a mixture of gaseous reactants decreases by 206. kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that -145. kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction. Be sure your answer has the correct number of significant digits. O exothermic Is the reaction exothermic or endothermic? O endothermic
Measurements show that the energy of a mixture of gaseous reactants increases by 396. kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that 122. kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction. Be sure your answer has the correct number of significant digits. O exothermic Is the reaction exothermic or endothermic? O endothermic
Measurements show that the energy of a mixture of gaseous reactants increases by 301. kJ during a certain chemical reaction, which is carried out at a constant pressure. Furthermore, by carefully monitoring the volume change it is determined that – 104. kJ of work is done on the mixture during the reaction. Calculate the change in enthalpy of the gas mixture during the reaction. Be sure your answer has the correct number of significant digits. O exothermic ? Is the reaction exothermic or endothermic? O endothermic
When a 8.00 g8.00 g sample of RbBrRbBr is dissolved in water in a calorimeter that has a total heat capacity of 3.03 kJ⋅K−1,3.03 kJ⋅K−1, the temperature decreases by 0.350 K.0.350 K. Calculate the molar heat of solution of RbBr.
A piece of metal of mass 15 g at 99◦C is placed in a calorimeter containing 41.3 g of water at 19◦C. The final temperature of the mixture is 40.2◦C. What is the specific heat capacity of the metal? Assume that there is no energy lost to the surroundings. Answer in units ofJg·◦C.
When 1.0 mol N204(g) is formed from 2.0 mol NO2(g) under constant pressure (1 atm) at 298 K, please calculate:(a) the reaction enthalpy (ArH) of this reaction according to the standard molar formation enthalpy of NO2(g) and N204(g)at 298 K, +33.85 kJ/mol and +9.66 kJ/mol, respectively.(b) the entropy change in the surrounding. (hint: equal to the heat received by surrounding / temperature of thesurrounding)
Hw.77.
A 25.0 mL portion of dilute HCl (aq) is combined with a 25.0 mL portion of dilute NaOH in a coffee-cup calorimeter. Both solutions are initially at a temperature of 23.3 ºC. The reaction produces enough heat to raise the final temperature of the 50.0 mL of liquid in the calorimeter to 25.3 ºC . What is qrxn in J? Assume the density of the reaction mixture is 1.0 g/mL and the specific heat of the solution is 4.184 J/g· ºC