Calculate the standard molar enthalpy, Physics

Assignment Help:

(a) Using the thermochemical tables provided, calculate the standard molar enthalpy of combustion at 298 K for the following hydrocarbon:  C C2H4 (g ) (ethene) 

(b)  If a combustion reaction were carried out in a bomb calorimeter using 55g of your compound, what would be the amount of heat released?       

(c)  Estimate the standard molar enthalpy of combustion of the compound used in part (a), at  a temperature of 376.9K, given the following molar heat capacities:                            

 

Cp,m/ J K-1 mol-1

 

A C3H8 (g)

73.5

B C4H10 (g )

97.5

C C2H4 (g )

43.6

D C3H6 (g )

63.9

EC4H8 (g )

85.7

O2 (g)

29.4

CO2 (g)

37.1

H2O (l)

75.3

What assumption has been made in your calculation?

(d)   From the mean bond enthalpy data given below, estimate the enthalpy change for the complete combustion of  one mole of  your compound at 298 K.  (The molar enthalpy of vaporization of water is 45.0 kJ mol-1 at 298K).

Bond

C-H

O=O

O-H

C=O

C-C

C=C

 Mean bond enthalpy/kJmol-1

414

499

460

799

347

612

 (e) Comment on your answers to parts (a) and (d). 


Related Discussions:- Calculate the standard molar enthalpy

Give the location of the image and the magnification, Q. A 4.5cm needle is ...

Q. A 4.5cm needle is placed 12cm away from a convex mirror of focal length 15cm. Give the location of the image and the magnification. Describe what happens as the needle is moved

Crystal growth, various techniques involved in crystal growth

various techniques involved in crystal growth

Which one of the following pairs is not correctly matched, Which one of the...

Which one of the following pairs is not correctly matched: (1) Rutherford-Proton (2) J.J. Thomsom-Electron (3) J.H. Chadwick-Neutron (4) Bohr-Isotope Ans:(4)Bohr-Is

Determine the current flowing in each of the four resistors, For the circui...

For the circuit shown in Figure calculate (a) The value of resistor Rx such that the total power dissipated in the circuit is 2.5kW, and (b) The current flowing in each of th

Compound pendulum., Ask question #Minimum 100 words accepteThe centre of os...

Ask question #Minimum 100 words accepteThe centre of oscillation of a meter stick suspended about a transverse axis is located at the 15 cm mark. Determine at what other positions

What is waveguide dispersion in optical fibres, What is waveguide dispersio...

What is waveguide dispersion in optical fibres? Waveguide dispersion (Δτ w ): Waveguide dispersion occurs because of the dependence onto the velocity of propagation of every

Uniform Motion, It normally takes maria 10 minutes to travel 5.0 miles to U...

It normally takes maria 10 minutes to travel 5.0 miles to UTPA along a straight road. Maria leaves home 15 minutes before class begins. Delays caused by a broken traffic light slow

Avogadro constant, Avogadro constant; L; NA (Count A. Avogadro; 1811) T...

Avogadro constant; L; NA (Count A. Avogadro; 1811) The number of items in a sample substance is equivalent to the number of atoms or molecules in a sample of ideal gas that is

Oscillations, M is the magnetic moment of bar magnet and T is time period ...

M is the magnetic moment of bar magnet and T is time period of oscillation. If we make M as M/4 then what will be the time period

Write Your Message!

Captcha
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