10. P4(s) + 5 02 (g) → P4010 (s) AHran = - 2967.3 kJ/mol rxn Tetraphosphorus is reacted with 20.0 grams of oxygen and all the energy is transferred to water. The total mass of the water is 2000 grams. Calculate the change in temperature for the water. The specific heat of water is 4.18 A 57.2°C B 44.4°C C 222°C D 11.4°C

10. P4(s) + 5 02 (g) → P4010 (s) AHran = - 2967.3 kJ/mol rxn Tetraphosphorus is reacted with 20.0 grams of oxygen and all the energy is transferred to water. The total mass of the water is 2000 grams. Calculate the change in temperature for the water. The specific heat of water is 4.18 A 57.2°C B 44.4°C C 222°C D 11.4°C

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

6 8 7. Consider the following reaction: 2 CH;OH (g) → 2 CH4() O2 (g), AH = + 252.8 kJ a) Is this reaction exothermic or endothermic? b) Calculate the amount of heat transferred when 26.0 g of CH3OH(g) is decomposed by this reaction at constant pressure. Express the heat to three significant digits with the appropriate units. c) For a given sample of CH;OH, the enthalpy change during the reaction is 82.9 kJ. What mass of methane gas is produced? Express the mass to three significant digits with the appropriate units. d) How many kilojoules of heat are released when 38.8 g CH4(g) reacts completely with 02(g) to form CH,OH(g) at constant pressure?
When 15.8 g KBr(s) dissolves in 119.7 g of water at 24.2°C, the final temperature of the solution comes to 21.1°C. Assume the heat capacity of the solution is roughly 4.18 J/(g·°C). What is the molar enthalpy of a solution of potassium bromide (119.00 g/mol)?
A 1.800-g sample of phenol (C6H4O2) was burned in a bomb calorimeter whose total heat capacity is 11.84 kJ/°C. The temperature of the calorimeter plus contents increased from 20.82 °C to 27.81 °C. What is the heat of combustion per gram of phenol?
4. The reaction of 250.0 mL of a 1.00 M hydrochloric acid solution with 250.0 mL of a 1.00 M sodium hydroxide solution was carried out in a constant pressure calorimeter. The total heat capacity of the calorimeter plus solutions was 6.45 kJ/K. The temperature of the calorimeter and solutions increased by 2.11°C. What is AH (in kJ) for the neutralization of 1.00 mol HCl(aq) by NaOH(aq)? A) -54.4 B) -21.2 +12.6 +54.4 E) -12.6
As a system increases in volume, it absorbs 52.0 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.597 atm. The final volume of the system is 58.6 L. What was the initial volume of the system if the internal energy of the system decreased by 106.2 J? Volume = L
One day while camping, a student used a propane stove to boil some water. The student heated 5.00 L of water from 15.6°C to 98.5°C. The molar enthalpy of combustion of propane is -2043.9 kJ/mol and heating the water required 1.38 mol of propane. Determine the efficiency of the propane camp stove if the heat released from the stove was used to heat the water. 62.4 % 38.4% D162 % 61.6%
A 1.75 g sample of zinc metal is reacted with 128 g of 1.10 M hydrochloric acid solution in a constant-pressure calorimeter. The resulting solution changes in temperature from 22.58 °C to 22.97 °C. The hydrochloric acid is in excess. Based on this information, and estimating the solution's heat capacity as 4.18 Jg1 °C, what is the amount of heat, in joules, transferred in this reaction?
An unknown sample of coal is burned in an apparatus with a calorimeter constant of 0.8 kJ/°C. When a 0.443-g sample is used, the temperature change is 8.61°C. What is the energy density of the sample in kJ/g?
22. A 44.97−g sample of water at 72.2°C is added to a sample of water at 25.7°C in a constant-pressure calorimeter. If the final temperature of the combined water is 38.4°C and the heat capacity of the calorimeter is 26.3 J/°C, calculate the mass of the water originally in the calorimeter.
Consider the following reaction: 2Mg(s)+O2(g)⟶2MgO(s)ΔH∘=−1203kJ What mass of magnesium must be combusted in order to generate 174.0 kJ of heat?
A quantity of 100.0 mL of 1.0 M HCl and 100.0 mL of 1.0 M NaOH are mixed in a calorimeter. The initial temperatures of the HCl and NaOH solutions are the same at 20.0°C and the final temperature of the mixture is 27.0oC. Calculate the heat of neutralization for the reaction in kJ/mole of NaOH. Assume the density and specific heat of the solutions are the same as pure water and that no heat was lost to the surroundings.