Explain the heats of combustion of the elements

Assignment Help Chemistry
Reference no: EM13542717

The enthalpy change for the reaction between W(s) and C(graphite) is difficult to measure directly because the reaction occurs at 1400degree C

W(s) + C(graphite) -- WC(s)

However the heats of combustion of the elements and of tungsten carbide can be measured and are given below:

2W(s) + 3O2(g)--2WOcube(S) delta H = -1680.6kJ

C(graphite) + O2(g) -- CO2(g) delta H = -393.5kJ

2WC(S) + 5O2(g) -- 2WO3(s) +2CO2(g) delta H +-2391.6kj

Reference no: EM13542717

Questions Cloud

What is the weight of the ball-cylindrical beaker of height : A cylindrical beaker of height 0.100 and negligible weight is filled to the brim with a fluid of density = 890 . When the beaker is placed on a scale, its weight is measured to be 1.00 .(Figure 1)
Explain celsius when placed in a calorimeter containing : Find the specific heat of an unknown metal if a 35.5 gram sample at 99.6 degrees Celsius produced a resulting temperature of 26.1 degrees Celsius when placed in a calorimeter containing 100.5 grams of water at 20.2 degrees Celsius.
Evaluate the change in the gravitational potential energy : Four particles, each of mass 20.0 g, that form a square with an edge length of d = 0.800 m. what is the change in the gravitational potential energy of the four-particle system
Globalization and diversity impact : Globalization and Diversity Impact on Healthcare Organizations
Explain the heats of combustion of the elements : The enthalpy change for the reaction between W(s) and C(graphite) is difficult to measure directly because the reaction occurs at 1400degree C, W(s) + C(graphite) -- WC(s). However the heats of combustion of the elements and of tungsten carbide can ..
Compute what is their period of revolution in years : In a certain binary-star system, each star has the same mass which is 9.6 times of that of the Sun, and they revolve about their center of mass. What is their period of revolution in years
The president of a multi hospital system : You are the president of a multi hospital system that is growing at a rapid pace. There are strains on resources, and pressures to find new ways to achieve an economic scale in operations. In a meeting with the staff, a suggestion was made to ..
Explain a preservative and antigingivitis agent : A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent. One tube contains 125 toothpaste.
Determine what is the rms current in the circuit : The generator in a purely capacitive AC circuit has an angular frequency of 126? rad/s and a maximum voltage of ?Vmax = 129 V. what is the RMS current in the circuit

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