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
vazorg [7]
2 years ago
13

Pls help me it detects if it’s right or wrong

Chemistry
1 answer:
Molodets [167]2 years ago
5 0

Answer:

Its C or A

Explain:

You might be interested in
What is the entropy change of the surroundings
KiRa [710]

Answer: The entropy change of the surroundings will be -17.7 J/K mol.

Explanation: The enthalpy of vapourization for 1 mole of acetone is 31.3 kJ/mol

Amount of Acetone given = 10.8 g

Number of moles is calculated by using the formula:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Molar mass of acetone = 58 g/mol

Number of moles = \frac{10.8}{58}=0.1862moles

If 1 mole of acetone has 32.3 kJ/mol of enthalpy, then

0.1862 moles will have = \frac{32.3}{1}\times 0.1862=5.828kJ/mol

To calculate the entropy change for the system, we use the formula:

\Delta S_{sys}=\frac{\Delta H_{vap}}{T(\text{ in K)}}

Temperature = 56.2°C = (273 + 56.2)K = 329.2K

Putting values in above equation, we get

\Delta S_{sys}=\frac{5.828}{329.2}=0.0177kJ/Kmol=17.7J/Kmol   (Conversion Factor: 1 kJ = 1000J)

At Boiling point, the liquid phase and gaseous phase of acetone are in equilibrium. Hence,

\Delta S_{system}+\Delta S_{surrounding}=0

\Delta S_{surrouding}=-\Delta S_{system}=-17.7J/Kmol

5 0
3 years ago
Enter the appropriate symbol for an isotope of potassium-39 corresponding to the isotope notation A/Z x
Taya2010 [7]
Appropriate symbol for an isotope of potassium - 39 corresponding to the isotope notion r A ZX
7 0
3 years ago
Can animals detect radio waves
Svetach [21]

Answer:

No.

Explanation:

No organism can detect X-rays or radio waves

4 0
2 years ago
Read 2 more answers
Question 1 (1 point)
Marizza181 [45]
Both ehhevshahahbsbdvhshs
4 0
2 years ago
Compared to most substances, water is unusual because it ____ when it goes from the liquid to solid state.
yuradex [85]

Answer:

expands

Explanation:

Most substances become increasingly compressed when frozen solid, but water is a famous exception.

6 0
3 years ago
Read 2 more answers
Other questions:
  • An Erlenmeyer flask contains 25.00 mL of 0.10 M HCl. What is the pH of the solution?
    7·2 answers
  • The physical state in which a substance has a no definite volume is:
    6·1 answer
  • Which term represents the attraction one atom has for the electrons in a bond with another atom? A. electronegativity B. electri
    13·1 answer
  • Which medieval structural innovation resulted in the wide aisles and high vaulted ceilings of Notre-Dame de Chartres?
    6·1 answer
  • How many moles of C6H12O2 are needed to get 12 moles of CO2
    12·1 answer
  • Explain why are metals good conductors and why covalent bonds are not
    8·1 answer
  • The apparatus which cools the gas is called a ______. This changes a gas into a liquid.
    6·1 answer
  • Please help me I've been crying for hours trying to figure this out. I don't have any materials to even complete this lab!!! If
    14·1 answer
  • What is the empirical formula of CoH1803? (4 points)
    6·1 answer
  • jason and manuel wanted to separate sand from water in the space provided draw the set up required to obtain water from such a m
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!