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
Iteru [2.4K]
2 years ago
5

Calculate AHræn for the following reaction

Chemistry
1 answer:
HACTEHA [7]2 years ago
8 0

Answer:

60ax 70by 67ay ah251

Explanation:

You might be interested in
Quinine is an important type of molecule that is involved in photosynthesis. The transport of electrons mediated by quinone in c
Irina18 [472]

Answer:

The heat of combustion is -25 kJ/g = -2700 kJ/mol.

Explanation:

According to the Law of conservation of energy, the sum of the heat released by the combustion reaction and the heat absorbed by the bomb calorimeter is equal to zero.

Qcomb + Qcal = 0

Qcomb = - Qcal

The heat absorbed by the calorimeter can be calculated with the following expression.

Qcal = C × ΔT

where,

C is the heat capacity of the calorimeter

ΔT is the change in temperature

Then,

Qcomb = - Qcal

Qcomb = - C × ΔT

Qcomb = - 1.56 kJ/°C × 3.2°C = -5.0 kJ

Since this is the heat released when 0.1964 g o quinone burns, the energy of combustion per gram is:

\frac{-5.0kJ}{0.1964g} =-25kJ/g

The molar mass of quinone (C₆H₄O₂) is 108 g/mol. Then, the energy of combustion per mole is:

\frac{-25kJ}{g} .\frac{108g}{1mol} =-2700kJ/mol

6 0
3 years ago
(6 pt) Match each word from Column A with the correct definition from Column B. Column A Column B 1. element 2. compound 3. reac
Marat540 [252]
1. D
2. C
3. F
4. E
5. A
6. B
3 0
2 years ago
An atom has a mass number of 24 and 13 neutrons. what is the atomic number of this atom?
Elodia [21]
do ityou times 24×13=312.
3 0
3 years ago
Enthalpy of combustion of ethyl alcohol, C2 H5 OH, is – 950 kJ mol–1. How much heat is evolved when one gram of ethyl alcohol bu
melomori [17]
<h3>Answer:</h3>

20.62 Kilo-joules

<h3>Explanation:</h3>
  • The Enthalpy of combustion of ethyl alcohol is -950 kJ/mol.
  • This means that 1 mole of ethyl alcohol evolves a quantity of heat of 950 Joules when burned.

Molar mass of ethyl ethanol = 46.08 g/mol

Therefore;

46.08 g of  C₂H₅OH evolves heat equivalent to 950 kilojoules

We can calculate the amount of heat evolved by 1 g of C₂H₅OH

Heat evolved by 1 g of C₂H₅OH  = Molar enthalpy of combustion ÷ Molar mass

                                      = 950 kJ/mol ÷ 46.08 g/mol

                                      = 20.62 Kj/g

Therefore, a gram of C₂H₅OH  will evolve 20.62 kilo-joules of heat

7 0
2 years ago
PLEASE HELP ASAP!!
nikitadnepr [17]

The answer is B) The dependent variable relies upon the independent variable

3 0
2 years ago
Read 2 more answers
Other questions:
  • A moving company is called into a building and asked to relocate 520 bricks to a location 15 meters above the ground. If each br
    13·2 answers
  • Suppose that you drop three objects into a glass of water: a piece of styrofoam, a piece of oak, and a gold ring. Which float, a
    11·1 answer
  • Which process would most likely be employed to separate a mixture of sand and water?
    9·2 answers
  • Calculate the amount of heat needed to raise the temperature of 4 ml of water from 10C to 30C
    9·1 answer
  • ILL GIVE BRAINLIST Mrs. Kucalaba downloaded some science music from the Internet onto her iPhone. She listened to the science mu
    6·1 answer
  • Cruising down the street in my 6-4
    9·1 answer
  • If the point of the nail can be approximated as a circle with a radius 2.00×10^-3m What is the pressure in MPa exerted on the wa
    15·1 answer
  • What is a quick way to determine how many energy levels an element possesses?
    13·1 answer
  • Which of the following physical changes is not an example of a change in state?
    14·1 answer
  • In a ketone, the carbonyl group is bonded to how many hydrogen atoms? none one two three four
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!