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
Ugo [173]
3 years ago
5

Urea spontaneous dissolves in water (to a high concentration). When urea dissolves in water, the solution cools before reaching

thermal equilibrium with its surroundings. What can you say about the direction of change in the solution's entropy
Chemistry
1 answer:
frez [133]3 years ago
4 0

Answer:

  • <u>If the amount of heat released by the solution, when it cools, is greater than the decrease in the free energy, the entropy will decrease, and if the amount of heat released by the solution is less than the decrease in the free energy, the entropy decreases.</u>

Explanation:

In an spontaneus reaction the free energy decreases: ΔG < 0.

Since, the solution cools its enthalpy decreases: ΔH < 0.

By definition ΔG = ΔH - TΔS

Then, you can solve for TΔS:

  • TΔS = ΔH - ΔG

Since ΔG is negative, - ΔG is positive.

Then, TΔS will be a negative value (ΔH) plus a positive value (-ΔG).

If the magnitue of the negative value is greater than the positive value, TΔS will be negative, and the entropy decreases.

If, on the other hand, the magnitude of the negative value is less than the positive value, TΔS will be positive, and the entropy increases.

That means, that if the amount of heat released by the solution, when it cools, is greater than the decrease in the free energy, the entropy will decrease, and if the amount of heat released by the solution is less than the decrease in the free energy, the entropy decreases.

You might be interested in
Which processes are part of the fast carbon cycle?
SVETLANKA909090 [29]

Answer:

B) Transportation and photosynthesis

C) Cellular respiration and photosynthesis

6 0
2 years ago
The hydrogen atom is not actually electronegative enough to form bonds to xenon. were the xenon-hydrogen bond to exist, what wou
Marat540 [252]

Answer : The structure of XeH_4 will be square-planar.

Explanation :

In the given molecule XeH_4, 'Xe' is the central atom and 'H' is the terminal atom.

Xenon has 8 valence electrons and hydrogen has 1 valence electron. Therefore, the total number of valence electrons are 8 + 4(1) = 12 electrons.

The number of electrons used in Xe-H bonding = 8 electrons

The remaining electrons which are used as lone pair on central atom (Xe) = 12 - 8 = 4 electrons

There are 4 bonding pairs and 2 lone pairs of electrons, they will be arranged in the octahedral arrangement around the central atom with 2 lone pairs of electrons on central atom. The lone pairs are arranged linearly across the central atom. The resulting structure will be square-planar.

The structure of XeH_4 is shown below.

5 0
3 years ago
Write equations to show whether the solubility of either of the following is affected by pH: (b) Hg₂(CN)₂.
nata0808 [166]

<u> Increasing pH will increase the solubility of the Hg2(CN)2 by shifting </u><u>equilibrium </u><u>to right side.</u>

What is the meaning of OH in chemistry?

The chemical group, ion, or radical OH that consists of one atom of hydrogen and one of oxygen and is neutral or negatively charged.

Hg2(CN)2 + 2OH-  ----> 2HgO(s) + 2HCN

adding OH- to the mercury(l) cyanide  will cause the formation of the solid HgO.

therefore increasing pH will increase the solubility of the Hg2(CN)2 by shifting equilibrium to right side.

Learn more about OH

brainly.com/question/2911201

#SPJ4

3 0
1 year ago
por favor es urgente!!!!!!!!.... 1 -¿cuántos átomos- gramos de cloro hay en 88,75 g de dicho elemento? 2-¿calcular los moles de
Mamont248 [21]

Answer:

don't understand your language

6 0
3 years ago
Please help me, please
kumpel [21]
The temperature of a substance is related to the speed of the substance's particles. So, when the temperature of a substance changes,the speed of the particles also changes. So B.
6 0
3 years ago
Other questions:
  • The list below includes some of the properties of ammonia. Identify the physical properties in the list. Check all of the boxes
    12·2 answers
  • What test or tests do you use to find NaCl
    12·2 answers
  • How many moles are equal to 5.82 x 10^23 atoms of tungsten (w)
    8·2 answers
  • A
    9·1 answer
  • When an atom gains a valence electron, it become a (n)_____ion.
    12·1 answer
  • Which is a homogeneous mixture?
    7·1 answer
  • Jay and Jeff were responsible for recording the class weather data each day in march. What weather instrument, seen here, should
    14·1 answer
  • En un atomo polielectronico el sbnivel difuso esta constituido de 5 orbitas degenerdos?
    14·2 answers
  • HELP ! DUE IN 41 MINUTES!<br> WILL GIVE BRAINLISIT!!!!!!
    6·1 answer
  • Which postulate of daltons atomic model was later changed and why
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!