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
artcher [175]
3 years ago
9

The heat of vaporization of acetic acid is . Calculate the change in entropy when of acetic acid condenses at .

Chemistry
1 answer:
Umnica [9.8K]3 years ago
8 0

The question is incomplete, the complete question is;

The heat of vaporization ΔHv of acetic acid HCH3CO2 is 41.0 /kJmol. Calculate the change in entropy ΔS when 954.g of acetic acid condenses at 118.1°C. Be sure your answer contains a unit symbol. Round your answer to 3 significant digits.

Answer:

-1.67 JK-1

Explanation:

Since Heat of vaporization of acetic acid = 41.0 kJ/mol

Therefore:

Heat of condensation of acetic acid = -41.0 kJ/mol

Mass of acetic acid = 954 g

Temperature of condensation = 118.1 °C or 391.1 K

Number of moles of acetic acid = 954 g/60g/mol = 15.9 moles

Heat evolved during condensation = 15.9 moles *  -41.0 kJ/mol = -651.9 KJ

Entropy change (ΔS) = Heat evolved/ Temperature = -651.9 KJ/391.1 K

Entropy change (ΔS) = -1.67 JK-1

You might be interested in
a square boat made from iron has overall dimensions of 2.00 cm x 11.0 cm x 11.0 cm. it has a mass of 213 g. water has a density
Stolb23 [73]
Density of boat  =  \frac{MASS}{VOLUME}
                           
                          =  \frac{213 g}{(2 cm  *  11 cm  *  11cm)}
 
                          =   0.88 g / cm³

Since the density of water is greater than the density of the boat ( 1 > 0.88) then that means, the boat will NOT sink.

B.

4 0
3 years ago
Read 2 more answers
Which of the following could be the subsh
andreev551 [17]

Answer:

2s^2 2p^2

Explanation:

Group 4A contains a total of 4 electrons for each atom in their valence shell. Filling the orbital diagram, let's say, for carbon, notice that when we start with period 2, we have two elements in the s-block, that is, lithium and beryllium. They correspond to the two s electrons that belong to the valence shell of carbon.

Moving on, we have boron and carbon, the remaining 2 electrons. Now, starting with boron, we're in the p-block.

That said, looking at the second period, the electron configuration for the valence shell of a group 4A element would be:

2s^2 2p^2

6 0
3 years ago
2.0x10^24 atoms of S to moles (3.3)
Alina [70]
Dhdhdnsnnsnsnsnsksks
5 0
3 years ago
Circle the atom with the largest atomic radius in each group
Dominik [7]

Answer:

The atomic radius increases down the group because more shell are added

Explanation:

Al >B

Na>Al

S>O

O>F

Br>Cl

Mg>Ca

4 0
3 years ago
Which label belongs in the region marked X?
lubasha [3.4K]

Answer:

A) involves changes in temperature

Explanation:

The figure is missing, but I assume that the region marked X represents the region in common between Gay-Lussac's law and Charle's Law.

Gay-Lussac's law states that:

"For an ideal gas kept at constant volume, the pressure of the gas is directly proportional to its absolute temperature"

Mathematically, it can be written as

p\propto T

where p is the pressure of the gas and T its absolute temperature.

Charle's Law states that:

"For an ideal gas kept at constant pressure, the volume of the gas is directly proportional to its absolute temperature"

Mathematically, it can be written as

V\propto T

where V is the volume of the gas and T its absolute temperature.

By looking at the two descriptions of the law, we see immediately that the property that they have in common is

A) involves changes in temperature

Since the temperature is NOT kept constant in the two laws.

7 0
3 years ago
Other questions:
  • Propane, the gas used in barbeque grills, is made of carbon and hydrogen. Will the atoms that make up propane form covalent bond
    8·2 answers
  • Acids, when mixed with water, do which of the following... A Taking away protons from the water molecules B Giving away protons
    13·1 answer
  • How much heat is absorbed during production of 136 g of NO by the combination of nitrogen and oxygen?
    10·1 answer
  • How many grams of CO2could be produced from the combustion of 23g of C4H10in the presence of an adequate amount of O2?
    9·1 answer
  • The chemical formula for glucose is C6H1206. Therefore, four molecules of glucose will have() carbon atoms()
    7·1 answer
  • Identify bohrs model of the atom. His model described the reactivity of an element based on its number of valence electrons.
    5·2 answers
  • What does the o in chemistry mean?
    8·2 answers
  • What is the answer?
    12·1 answer
  • Identify four properties of a substance that will never change
    7·2 answers
  • Why do pengiuns have beards
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!