1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vesnalui [34]
3 years ago
14

The heat capacity of chloroform (trichloromethane,CHCl3)

Chemistry
1 answer:
allsm [11]3 years ago
5 0

Answer : The change in molar entropy of the sample is 10.651 J/K.mol

Explanation :

To calculate the change in molar entropy we use the formula:

\Delta S=n\int\limits^{T_f}_{T_i}{\frac{C_{p,m}dT}{T}

where,

\Delta S = change in molar entropy

n = number of moles = 1.0 mol

T_f = final temperature = 300 K

T_i = initial temperature = 273 K

C_{p,m} = heat capacity of chloroform = 91.47+7.5\times 10^{-2}(T/K)

Now put all the given values in the above formula, we get:

\Delta S=1.0\int\limits^{300}_{273}{\frac{(91.47+7.5\times 10^{-2}(T/K))dT}{T}

\Delta S=1.0\times [91.47\ln T+7.5\times 10^{-2}T]^{300}_{273}

\Delta S=1.0\times 91.47\ln (\frac{T_f}{T_i})+7.5\times 10^{-2}(T_f-T_i)

\Delta S=1.0\times 91.47\ln (\frac{300}{273})+7.5\times 10^{-2}(300-273)

\Delta S=8.626+2.025

\Delta S=10.651J/K.mol

Therefore, the change in molar entropy of the sample is 10.651 J/K.mol

You might be interested in
Momentum is. __________
horrorfan [7]
 is the product of the mass and velocity of an object, quantified in kilogram-meters per second. 
7 0
3 years ago
Help i just need people to answer the question today
yKpoI14uk [10]

Answer:

1) Hydrogen

2) Methane

3) Carbon

4) Structural isomer

5) Ethene also known as ethylene

6) Hydrocarbons are widely used as fuel

7) Crude oil

Explanation:

6 0
3 years ago
What is the significance of "Er" in the diagram?
Drupady [299]

Answer:

The significance of "Er" in the diagram is :

B.) Threshold energy for reaction

Explanation:

Threshold energy : It is total amount of energy required by the reactant molecule to reach the transition state .

Activation energy : It is the excess energy absorbed by the molecules to reach the transition state.

<u>Activation Energy = Threshold Energy - Average Kinetic Energy</u>

<u>This means Activation energy decreases on increasing kinetic energy</u>

On increasing Temperature average kinetic energy of the molecule increases which reduces the activation energy and the reaction occur faster in that case.

Catalyst also reduces the Activation energy.

<u>Er = Threshshold energy for reaction at 30 degree</u>

<u>Ea = Activation Energy</u>

<u>The given figure shows that the threshold energy decreases on increasing the temperature</u>

<u>Only the molecule having energy greater than Er can react to form product</u>

3 0
3 years ago
Read 2 more answers
The aldol condensation involves nucleophilic attack of an enolate to a carbonyl. Use the pop-up menus to identify the total numb
Sindrei [870]

Aldol condensation involves the reaction of an acid or base with a carbonyl group producing a nucleophile that attacks another carbonyl compound  to yield a β-hydroxyaldehyde or β-hydroxyketone compound.

<h3>What is aldol condensation?</h3>

The aldol condensation is a reaction in organic chemistry in which there is a reaction between an acid or base and a carbonyl group which then serves as the nucleophile that attcks a second carbonyl to yield a β-hydroxyaldehyde or β-hydroxyketone compound.

The aldol condensation may be acid catalysed or base catlysed. The question is incomplete hence the complete mechanimsms can not be decuced.

Learn more about aldol condensation: brainly.com/question/9415260

3 0
2 years ago
A third baseman throws a ball from third to first. The ball travels a 20 m/s of 2 seconds. What is the distance between third ba
umka21 [38]

Answer:

the answer would be D

Explanation:

5 0
3 years ago
Other questions:
  • All of the following are examples of carbohydrates except fiber. proteins. starches. sugars.
    9·2 answers
  • Choose all the answers that apply.
    15·1 answer
  • Write a chemical equation that describes the dissolving of solid magnesium nitrate, Mg(NO3)2, in water.
    11·2 answers
  • Which is a nonliving factor that defines a spruce-fir forest ecosystem
    7·1 answer
  • Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules as necessary. precipita
    12·1 answer
  • Unit cells provide the simplest repeating structures of a crystal. This means a unit cell must contain an integer multiple of th
    11·1 answer
  • EASY BUT I STILL NEED HELP
    8·2 answers
  • Why does sound travel at different speeds through various materials?
    7·2 answers
  • What is the volume of a piece of metal that has a density of 6.68g.cm^3 and has a mass of 1975 g?
    7·1 answer
  • If there is no change in concentrations, why is the equilibrium state considered dynamic?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!