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
amm1812
3 years ago
13

A gas at 29.4 kPa is cooled from a temperature of 75°C to a temperature of 25°C at constant volume. What is the new pressure of

the gas?
Chemistry
2 answers:
morpeh [17]3 years ago
8 0

Answer : The new pressure of gas will be, 25.176 kPa

Solution :

Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.

P\propto T

or,

\frac{P_1}{T_1}=\frac{P_2}{T_2}

where,

P_1 = initial pressure of gas = 29.4 kPa

P_2 = final pressure of gas = ?

T_1 = initial temperature of gas = 75^oC=273+75=348K

T_2 = final temperature of gas = 25^oC=273+25=298K

Now put all the given values in the above equation, we get the final pressure of gas.

\frac{29.4kPa}{348K}=\frac{P_2}{298K}

P_2=25.176kPa

Therefore, the new pressure of gas will be, 25.176 kPa

kirill115 [55]3 years ago
7 0

<span>To solve this we assume that the gas inside the balloon is an ideal </span>gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant volume pressure and number of moles of the gas the ratio of T and P is equal to some constant. At another set of condition, the constant is still the same. Calculations are as follows:

 

T1/P1 = T2/P2

P2 = T2 x P1 / T1

P2 = 25 x 29.4 / 75

P2 = 9.8 kPa

You might be interested in
Describe how spead, velocity and<br> brcoloration are related.
Flura [38]

Answer:

Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the position changes.

3 0
3 years ago
A sample of octane (c8h18 that has a mass of 0.750 g is burned in a bomb calorimeter. as a result, the temperature of the calori
timurjin [86]
In a closed system, heat should be conserved which means that the heat produced in the calorimeter is equal to the heat released by the combustion reaction. We calculate as follows:

Heat of the combustion reaction = mC(T2-T1)
                                                          = 1 (1.50) (41-21)
                                                          = 30 kJ
7 0
3 years ago
Read 2 more answers
6. 100 ml of gaseous hydrocarbon consumes 300
mario62 [17]

Answer:

  • <u><em>a. C₂H₄</em></u>

Explanation:

At constant pressure and temperature, the mole ratio of the gases is equal to their volume ratio (a consequence of Avogadro's law).

Hence, the <em>complete combustion reaction</em> that has a ratio of 100 ml of gaseous hydrocarbon to 300 ml of oxygen, is that whose mole ratio is 1 mol hydrocarbon : 3 mol of oxygen.

Then, you must write the balanced chemical equations for the complete combustion of the four hydrocarbons in the list of choices, and conclude which has such mole ratio (1 mol hydrocarbon : 3 mol oxygen).

A complete combustion reaction of a hydrocarbon is the reaction with oxygen that produces CO₂ and H₂O, along with the release of heat and light.

<u>a. C₂H₄:</u>

  • C₂H₄ (g) + 3O₂ (g) → 2CO₂(g)  + 2H₂O (g)

Precisely, for this reaction the mole ratio is 1 mol C₂H₄: 2 mol O₂, hence, this is the right choice.

The following analysis just shows that the other options are not right.

<u>b. C₂H₂:</u>

  • 2C₂H₂ (g) + 5O₂ (g) → 4CO₂(g)  + 2H₂O (g)

The mole ratio for this reaction is 2 mol C₂H₂ :5 mol O₂.

<u>с. С₃Н₈</u>

  • C₃H₈ (g) + 5O₂ (g) → 3CO₂(g)  + 4H₂O (g)

The mole ratio is 1 mol C₃H₈ : 5 mol O₂

<u>d. C₂H₆</u>

  • 2C₂H₆ (g) +7 O₂ (g) → 4CO₂(g)  + 6H₂O (g)

The mole ratio is 2 mol C₂H₆ : 7 mol O₂

7 0
3 years ago
“Least molecular motion, lowest kinetic energy, strongest forces of attention, most dense packaging of molecules”. Which state o
SashulF [63]
<h2><em>Solid. Because molecules densely packed it has a high resistance to flow thereby lower kinetic energy. </em></h2>
8 0
3 years ago
When you use a crowbar to lift a large rock, you are working against the force called
Ne4ueva [31]
Gravity. The rock is being pushed down and you are counteracting that force with a crowbar pushing it upward.
7 0
3 years ago
Other questions:
  • Valence bond theory predicts that bromine will use _____ hybrid orbitals in brf5.
    11·1 answer
  • All six carbon-carbon bonds in aromatic rings are equivalent; they are each somewhere between a single bond and a double bond. T
    14·1 answer
  • I don’t know the answer
    15·2 answers
  • Any one of the 6 machines that all machines are made of​
    6·1 answer
  • Draw the structure of the Tetrapeptide asp-met-lys-tyr
    14·1 answer
  • Definition: A one or two letter abbreviation for a chemical element.<br> Example: Cu is copper.
    15·2 answers
  • Which group will have an electron configuration that ends in s2?
    11·1 answer
  • Would the size of an item affect whether or not it is flammable?
    12·1 answer
  • What are common materials​
    5·1 answer
  • Suppose that 1500 kJ of energy were transferred to water at 20.0°C. What mass of water could be brought to the boiling point? He
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!