Explain what is the enthalpy change

Assignment Help Chemistry
Reference no: EM13332524

Consider: 2 B5H9 (g) + 12 O2 (g) ? 5 B2O3 (g) + 9 H2O (g) ?H?reaction= - 8687 kJ. What is the enthalpy change when 0.2500 moles of B5H9 are combusted?

Reference no: EM13332524

Questions Cloud

Explain what if you did the extraction 3 times : What if you did the extraction 3 times 3. What if you just used 45 mL of ether in one big extraction. Why isn't this better
Determine the work done by friction on the crate : You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor at constant speed. What is the work done by friction on the crate
How fast should the weight be thrown downward : A light but rigid stick is attached to a small weight. The other end of the stick is attached to a pivot. The pivot allows the stick and weight to spin in a vertical circle. how fast should the weight be thrown downward
What is the speed of the mass after going around the loop : A bead of mass m slides without friction down a track and around a loop-the-loop of radius R. The initial height of the track is h = 3.5R. What is the speed of the mass after going around the loop
Explain what is the enthalpy change : Consider: 2 B5H9 (g) + 12 O2 (g) ? 5 B2O3 (g) + 9 H2O (g) ?H?reaction= - 8687 kJ. What is the enthalpy change when 0.2500 moles of B5H9 are combusted
Explain the heat of formation : The heat of formation (?H°f) of MgCO3 (s) is -1095.8 kJ/mol. The chemical equation associated with this reaction is: MgO (s) + CO2 (g) ? MgCO3 (s) Mg+ (s) + CO3- (s) ? MgCO3 (s) Mg (s) + CO3 (s) ? MgCO3 (s) Mg (s) + C (s) + 3/2 O2 (g) ? MgCO3 (s) ..
What is the moment of inertia of the boxers forearm : he triceps muscle in the back of the upper arm extends the forearm. What is the moment of inertia of the boxer's forearm
What will be the velocity of the ball : A person is observing the motion of a ball on a flat surface and measuring its position in time. What will be the velocity of the ball relatively to each of the two observers
Explain effuses through a porous barrier at a rate : An unknown gas effuses through a porous barrier at a rate that is 0.752 times the rate of Ar (g) under the same conditions. Which of the following is the unknown gas. Cl2 (g) He (g) O2 (g) N2 (g) H2 (g)

Reviews

Write a Review

Chemistry Questions & Answers

  Steps in the mechanism for the following reaction

Show all the steps in the mechanism for the following reaction, When benzene is mixed with deuterated sulfuric acid, deuterium is slowly incorporated onto the ring. Show the mechanism for this reaction and explain how this relates the sulfonation of ..

  Prior to placing piece of metal into the graduated cylinder

This assignment inhibits chemistry Laboratory Questions.

  Write the structures of the saytzeff elimination

Write the structures of the saytzeff elimination

  Calculate ph - chemistry questions

Chemistry Questions on Calculate P H

  How many mols of hydrogen can produce

how many mols of H 2 can produce

  Analysis of corrosion mechanisms

Analysis of corrosion mechanisms and preventative measures

  Chemical and pharmaceutical science

Write an equation for the formation of an acetal from reaction of excess methanol with benzaldehyde in the presence of an acid catalyst.

  Calculate the approximate sulphur

Calculate the approximate SO 2 mass emission in lb/day.

  What is the structure - stereochemistry

What is the structure (including functional groups)? Stereochemistry (racemic or single enantiomer)?

  Design a qualitative analysis scheme

Design a qualitative analysis scheme

  What will be the resultant pressure

What will be the resultant pressure when the stopcock is opened?

  The 1h nmr spectrum

Integrals for some of the resonances in the 1H NMR spectrum are higher than they should be due to the shear number of hydrogens in this compound

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