### Part A**Under what conditions are ΔH and ΔU for a reaction involving gases and/or liquids or solids equal?**_Check all that apply._- [ ] ΔH = ΔU if all reactants and products are liquids or solids because, to a good approximation, the volume does not change as a result of the reaction.- [x] ΔH = ΔU if the change in the number of moles of gaseous species in the reaction is zero.- [ ] ΔH = ΔU if the reaction takes place at 298.15 K.- [x] ΔH = ΔU if all reactants and products are in their standard reference states.**Note:** The selected answers indicate an understanding that ΔH equals ΔU under specific conditions related to gaseous changes and standard states.**Feedback:**- Incorrect; Try Again; 4 attempts remaining.

According to the first law of thermodynamics, the internal energy change and enthalpy change of a…

Under what conditions are AH and AU for a reaction involving gases and/or liquids or solids equal? Check all that apply. ΔΗ AU if all reactants and products are liquids or solids because, to a good approximation, the volume does not change as a result of the reaction. νΔΗ = AU if the change in the number of moles of gaseous species in the reaction is zero. ΔΗ AU if the reaction takes place at 298.15 K. V AH = AU if all reactants and products are in their standard reference states.

Under what conditions are AH and AU for a reaction involving gases and/or liquids or solids equal? Check all that apply. ΔΗ AU if all reactants and products are liquids or solids because, to a good approximation, the volume does not change as a result of the reaction. νΔΗ = AU if the change in the number of moles of gaseous species in the reaction is zero. ΔΗ AU if the reaction takes place at 298.15 K. V AH = AU if all reactants and products are in their standard reference states.

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 chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 26.0 cm wide and 31.2 cm high. The maximum safe pressure inside the vessel has been measured to be 2.40 MPa. For a certain reaction the vessel may contain up to 0.237 kg of dinitrogen monoxide gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction. Write your answer in degrees Celsius. Round your answer to 3 significant digits. temperature: || °C Contacts G.. APR 24 80 888 F2 DII F3 F4 F7 F8 F9 F10
Automobile air bags employ a chemical reaction involving the rapid decomposition of sodium azide (NaN3) into sodium metal and nitrogen gas to inflate in a collision. How much sodium azide is required to decompose to inflate a 20.0 L air bag? Assume that the gas is at standard temperature and pressure, and thus occupies 22.4 L per mole. (AW: Na=23; N=14.007)
4
Suppose you have 1.25 moles of gaseous napthalene (C10H8) at T = 292 K. What is the average kinetic energy of one molecule of napthalene? (The molar mass of napthalene is 128 g/mol. You may assume that the gas molecules behave ideally.)
Please answer
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 52.0 cm wide and 62.4 cm high. The maximum safe pressure inside the vessel has been measured to be 7.20 MPa. For a certain reaction the vessel may contain up to 6.16 kg of dinitrogen monoxide gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction. Write your answer in degrees Celsius. Be sure your answer has the correct number of significant digits. temperature: °C
A student experimentally determines the gas law constant, R, by reacting a small piece of magnesium with excess hydrochloric acid and then collecting the hydrogen gas over water in a eudiometer. Based L-atm on experimentally collected data, the student calculates R to equal 0.0832 mol·K L-atm Ideal gas law constant from literature: 0.08206 mol·K (a) Determine the percent error for the student's R-value. Percent error = % (b) For the statements below, identify the possible source(s) of error for this student's trial. The student notices a large air bubble in the eudiometer after collecting the hydrogen gas, but does not dislodge it. The student does not clean the zinc metal with sand paper. The student does not equilibrate the water levels within the eudiometer and the beaker at the end of the reaction. The water level in the eudiometer is 1-inch above the water level in the beaker. The student uses the barometric pressure for the lab to calculate R.
Which of the following processes results in a more uniform distribution (greater dispersal) of energy? Deposition (direct conversion of a gas to a solid) Condensation 0000 Freezing Diffusion
‏You are working in an oil refinery . Where you use hydrocarbon gases like methane ( CH4 ) , ethane ( C2H5 , and propane ( C3Hg ) and prepared a mixture . When measured the pressure at 25 ° C it turns out to be 7.50 am This gas mixture was then also used in a mass spectrophotometer and the following data was obtained Based on this information find the partial pressure of each gas and report respectively as their name .appeared in the question
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 39.0 cm wide and 46.8 cm high. The maximum safe pressure inside the vessel has been measured to be 1.20 MPa. For a certain reaction the vessel may contain up to 0.560 kg of dinitrogen monoxide gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction. Write your answer in degrees Celsius. Be sure your answer has the correct number of significant digits. temperature: | °C
A sample of argon gas at 1.00 atm and 200. K has a volume of 40. 0 L. What is the volume if the temperature is increased to 400. K and the pressure becomes 2.00 atm? Explain your answer based on the changes to the pressure and the temperature. Show all work: Explain:…
The air pollutant NO is produced in automobile engines from the high-temperature reaction: N₂(g) + O2(g) = 2 NO(g) K 1.7 x 103 at 2300 K.