When 0.514 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.0 ∘C to 29.9 ∘C.Find ΔErxn for the combustion of biphenyl. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.86 kJ/∘C.Express the energy in kilojoules per mole to three significant figures.

Question
Asked Dec 2, 2019
200 views

When 0.514 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.0 ∘C to 29.9 ∘C.

Find ΔErxn for the combustion of biphenyl. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.86 kJ/∘C.

Express the energy in kilojoules per mole to three significant figures.
check_circle

Expert Answer

Step 1

The specific heat can be defined as the amount of heat per unit mass that is needed to raise the temperature of given substance by one degree Celsius.

The specific heat of water is 4.186 joule/gram °C. This can be used to calculate the heat required to raise the temperature for given substance.

Step 2

 The relation between heat change and specific heat is shown below;

help_outline

Image Transcriptionclose

93 mxсхдT Here q Amount of heat supplied m Mass of the substance c Substance's specific heat Change in temperature AT

fullscreen
Step 3

Heat capacity of the bomb calorimeter= 5.86 kJ/∘C

Tf = final temperature = 29.9 ∘C

Ti = Initial temperature = 25.0 ∘C...

help_outline

Image Transcriptionclose

q C x AT q 5.86 kJ/°C x (29.9°C-25.0°C) q=28.7 kJ

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Chemistry

Equilibrium Concepts

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: The last valence electron in V is 3d2. What are the quantum numbers for this electron. n= I=  ml=  m...

A: The valence electronic configuration of Vanadium is 3d2. From this outer electronic configuration, t...

question_answer

Q: You are asked to prepare a 0.8500 M solution of aluminum nitrate. You find that you have only 50.00 ...

A: From given mass the number of mole is determined by using formula n = m/M.= 50.0g/213 g mol-1 = 0.23...

question_answer

Q: According to experiments concerned with the photoelectric effect, which of the following/combination...

A: The kinetic energy of the electrons is given by

question_answer

Q: Suppose that 25 g of each of the following substances is initially at 28.0 ∘C. What is the final tem...

A: Specific heat capacity of gold is 0.129 J/g.oC.Heat absorbed =2.4 kJ = 2400 J

question_answer

Q: HOMEWORK Help? Thanks!

A: According to the H-NMR and IR spectrum give, the structure for the compound, C11H14O will be :

question_answer

Q: Organic chem homework help? Please?

A: The given compound undergoes solvolysis gives the corresponding ether product.

question_answer

Q: 8. Rate constant of some 1st order reaction is 4.0 x 103 s1 at 40 60C. Calculate the Arrenius parame...

A: Given:Temperature T1 = 40 oC = 313 K.Temperature T2 = 60 oC = 333 K.Rate Constant at T1 (K1) = 4.0×1...

question_answer

Q: Rencia- Fall19- PALENCIA Activities and Due Dates> HW 15 Hint Che Resources 985/2200 core: of 22> (a...

A: Given,250 ml of 0.4 M of sucrose.

question_answer

Q: Which principle or rule is violated by the following orbital diagram for the ground state valence el...

A: The given element is nitrogen.The atomic number of nitrogen is 7. Therefore, the electronic configur...