Explain enthalpy of formation of solid diboron trioxide

Assignment Help Chemistry
Reference no: EM13285273

Calculate the standard enthalpy of formation of solid diboron trioxide (B2O3) using the following thermochemical information:

B2O3(s) + 3 H2O(l) B2H6(g) + 3 O2(g) H = +2147.5 kJ

2 H2(g) + O2(g) 2 H2O(l) H = -571.7 kJ

2 B(s) + 3 H2(g) B2H6(g) H = +35.4 kJ

Reference no: EM13285273

Questions Cloud

Find the power being absorbed by the resistor : A current source of 12 cos2000t A, a 200 ohm resistor, and a 0.2 H inductor are in parallel. Assume steady-state condition exist. At t=1ms, find the power being absorbed by the (a) resistor; (b) inductor; (c) sinusoidal source.
Under what circumstances does the price of the call : A trader buys a European call option and sells a European put option. The options have the same underlying asset, strike price, and maturity. Describe the trader's position. Under what circumstances does the price of the call equal the price of th..
Explain the empirical formula of the indium compound : A sample of indium chloride weighing 0.5000g is found to contain 0.2404g of chlorine. What is the empirical formula of the indium compound
Why is wal-mart entering a new phase : Wal-Mart say "it helps drive down wage standards here and abroad. On the other hand, the CEO has announced a new policy after worker protests early in the year. Is it anything of significance? Is this Important to us in the world today
Explain enthalpy of formation of solid diboron trioxide : Calculate the standard enthalpy of formation of solid diboron trioxide (B2O3) using the following thermochemical information
Estimate the potential diference between you and your friend : When you touch a friend after walking across a rug on a dry day, you typically draw a spark of about 2 mm. Estimate the potential diference between you and your friend before the spark
Interest is payable twice a year : The company borrowed $30,000 on September 1, 2013. The principal is due to be repaid in 10 years. Interest is payable twice a year on each August 31 and February 28 at an annual rate of 10%.
Review of global health disparities across inter : Based on the review of global health disparities across inter/intra national countries, analyze data by the use of epidemiological analytical methods to infer the factors or causes for these public health disparities.
Explain isotope fractionation between water and vapor : What are the steps to determine isotope fractionation between water and vapor at 25 degrees C

Reviews

Write a Review

Chemistry Questions & Answers

  Explain a radioactive element has a half-life

A radioactive element has a half-life of 2.2 hours. How many hours will it take for the number of atoms present to decay to one-sixteenth of the initial value? Show your calculations

  State a new hydrocarbon with molecular formula

a new hydrocarbon with molecular formula C20H14 is obtained in low yield. The 13C NMR of this new product shows three peaks in the 120-150 ppm range and one peak at 54 ppm.

  Calculate the weight of the amino acid sample

A 0.264-gram sample of an amino acid was dissolved in 95.0mL of water and titrated with 0.105M NaOH. The first equivalence point was found at V(OH)=16.3mL.

  Calculating the amount of n2 gas released

The solubility of N2 in blood at 37°C and at a partial pressure of 0.80 atm is 5.6 10-4 mol/L. A deep-sea diver breathes compressed air with the partial pressure of N2 equal to 3.6 atm.

  Determine the equilibrium concentration of h2s

A reaction mixture initially contains 2.8 M H2O and 2.6 M SO2. Determine the equilibrium concentration of H2S if Kc for the reaction at this temperature is 1.3 × 10-6.

  What is the new pressure

After 273 m3 of ethylene oxide at 748 kPa and 525 K is cooled to 293 K, it is allowed to expand to 1.10 × 103 m3. What is the new pressure?

  Explain what will be the concentration of c4h6

Butadiene, C4H6 (used to make synthetic rubber and latex paints) changes into C8H12 with a rate law of rate = 0.014 L/(mol·s) [C4H6]2. What will be the concentration of C4H6 after 2.0 hours if the initial concentration is 0.025 M

  Explain p-acetaminobenzensulfonic chloride reacts with water

Provide the reaction mechanism when p-acetaminobenzensulfonic chloride reacts with water

  How much faster will the reaction occur at 200°c

The activation energy for the formation of HCl from its elements: H2 (g) + Cl2 (g) → 2 HCl(g) is 155 kJ mol-1. How much faster will this reaction occur at 200°C versus at 100°C?

  Explain what is the ph of a solution made by titrating

What is the pH of a solution made by titrating 30.0 mL of 0.10M acetic acid with 30.0 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive.

  Define what is the empirical formula of the unknown compound

An unknown compound contains only C, H, and O. Combustion of 3.60 g of this compound produced 8.18 g of CO2 and 3.35 g of H2O.

  What mass of ki would have been produced

138g of K and 448g of I react completely to form KI. What mass of KI would have been produced if 138g of potassium and 41g of iodine has been used?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd