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
expeople1 [14]
3 years ago
15

When fuel is burned in a cylinder equipped with a piston, the volume expands from 0.255 L to 1.45 L against an external pressure

of 1.02 atm. In addition, 875 J is emitted as heat. What is the DE for the burning of the fuel?
Chemistry
1 answer:
EastWind [94]3 years ago
8 0

Answer : The value of \Delta E for the burning of the fuel is, -998.5 joules.

Explanation :

First we have to calculate the work done.

Formula used :

w=-p_{ext}dV\\\\w=-p_{ext}(V_2-V_1)

where,

w = work done  = ?

p_{ext} = external pressure = 1.02 atm

V_1 = initial volume of gas = 0.255 L

V_2 = final volume of gas = 1.45 L

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

w=-p_{ext}(V_2-V_1)

w=-(1.02atm)\times (1.45-0.255)L

w=-1.22L.atm=-1.22\times 101.3J=-123.5J

conversion used : (1 L.atm = 101.3 J)

Now we have to calculate the change in internal energy of the system.

\Delta E=q+w

\Delta E=-875J+(-123.5J)

\Delta E=-998.5J

Therefore, the value of \Delta E for the burning of the fuel is, -998.5 joules.

You might be interested in
Calculate the new pressure of a gas if the gas at 50 ˚C and 81.0 kPa is heated to 100 ˚C at a constant volume.
Debora [2.8K]

Answer:

93.5 kPa

Explanation:

Step 1: Given data

  • Initial pressure (P₁): 81.0 kPa
  • Initial temperature (T₁): 50 °C
  • Final pressure (P₂): ?
  • Final volume (T₂): 100 °C

Step 2: Convert the temperatures to the Kelvin scale

When working with gases, we need to consider the absolute temperature. We will convert from Celsius to Kelvin using the following expression.

K = °C + 273.15

T₁: K = 50°C + 273.15 = 323 K

T₂: K = 100°C + 275.15 = 373 K

Step 3: Calculate the final pressure of the gas

At a constant volume, we can calculate the final pressure of the gas using Gay-Lussac's law.

P₁/T₁ = P₂/T₂

P₂ = P₁ × T₂/T₁

P₂ = 81.0 kPa × 373 K/323 K

P₂ = 93.5 kPa

7 0
3 years ago
In an exothermic reaction, the average kinetic energy of the particles of matter ib the products _____
erastova [34]

Answer:

decreases

Explanation:

I'm hope it's correct

3 0
2 years ago
How do multiple forces interact
mars1129 [50]
<span>So what happens when there is more than one force? I like to think of net force as if two people were pulling on ropes attached to a big crate. If they pull the crate in the same direction, the crate will accelerate twice as quickly. If they pull in opposite directions with equal forces, the crate won’t move at all — these two forces cancel each other out. If one person pulls northwards and the other pulls eastwards, the crate will move to the north-east.




</span>
4 0
3 years ago
For each of the following ionic bonding examples, show the transfer of electrons, the ions resulting with the charges and the fi
fgiga [73]

Answer:

BaO

  • Ba gives up two electrons and becomes Ba⁺²
  • O takes two electron and becomes O⁻²

Al₂O₃

Mg₃P₂

Na₂O

CaCl₂

6 0
3 years ago
The role of pigments both in capturing light energy and in converting it to the chemical energy of ATP and NADPH.
Aleonysh [2.5K]

Answer:

The explanation of the processes in which pigments are involved (capturing light and forming ATP and NADPH) is given in the following paragraphs)

Explanation:

Pigments are molecules with the capacity of absorbing light. Each pigment captures light of a specific wavelength. Plants contain different types of pigments like chlorophylls, xanthophylls, carotenoids, and others.

Chloroplasts (organelles present in cells of plants), contain pigmants that absorb solar radiation, triggering a series of reactions collectively known as photosynthesis. When light incides on a pigment, an electron of this molecules is excitated, goes into another level of energy and starts to pass through a series of carrier molecules to finally to a final aceptor of electrons. During this transport, part of the energy contained in the electron is used to generates a hydrogen gradient that provides energy. As a result of these processes, a molecule that is called  NADP+ accepts two electrons and an hydrogen to form NADPH, while another molecule known as ADP captures  an atom of phosphorous and gives rise to ATP (through the action of a protein called ATP sintase)..

7 0
2 years ago
Other questions:
  • 1. From your best fit equation, calculate the pressure of the air inside the test tube if it were
    14·1 answer
  • Some velomobile seats have been designed to hold ice packs inside their cushions. If you started a ride with ice packs that held
    7·1 answer
  • The circumference of a circle is  feet. What is the length of the radius of this circle? 
    12·2 answers
  • How many moles are there in 80g of sodium<br> hydroxide?
    8·2 answers
  • Josh drives her scooter 7 km north. she stops for lunch and then drives 5 km east. what distance does she cover? what was her di
    5·1 answer
  • How many atoms are in 3.50 moles of calcium (Ca)?
    6·2 answers
  • A newspaper story describing the local celebration of Mole Day on October 23 (selected for Avogadro's number, 6.02 X 10^ 23 ) at
    6·1 answer
  • How much force is required to accelerate a 22 kg mass at 6 m/s2?s​
    11·1 answer
  • What is the number of moles of potassium chloride present in 142 g of kcl?
    6·1 answer
  • Convert 381 km to cm using dimensional analysis.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!