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
kaheart [24]
3 years ago
15

Which of the following is a list of the minimum amount of data needed for determining the molar enthalpy of solution of KCl(s) i

n pure H2O(1) ? (Assume that the KCl(aq) has the same specific heat capacity as pure water and that the initial temperatures of the KCl(s) and the water are the same.)
(A) Mass of KCl(s), initial temperature of the water, and final temperature of the solution
(B) Mass of H20, initial temperature of the water, and final temperature of the solution
(C) Mass of KCl(s), mass of H20, initial temperature of the water, and final temperature of the solution
(D) Mass of KCl(s), mass of H20, initial temperature of the water, final temperature of the solution, and atmospheric pressure
Chemistry
1 answer:
Gre4nikov [31]3 years ago
3 0

Answer:

 (C) Mass of KCl(s), mass of H20, initial temperature of the water, and final temperature of the solution

Explanation:

molar enthalpy of solution of KCl(s) is heat evolved or absorbed when one mole of KCl is dissolved in water to make pure solution . The heat evolved or absorbed can be calculated by the following relation.

Q = msΔt where m is mass of solution or water , s is specific heat and Δt is change in temperature of water .

So data required is mass of water or solution , initial and final temperature of solution , specific heat of water is known .

Now to know molar heat , we require mass of solute or KCl dissolved to know heat heat absorbed or evolved by dissolution of one mole of solute .

You might be interested in
How many moles are in 7950 g of CO2? ( pleas show calculation)
Mkey [24]

Answer:

Calculate the number of moles of CO2 by the formula n=PV/RT, where P is the pressure from Step 3, V is the volume from Step 2, T is the temperature from Step 1 and R is a proportionality constant equal to 0.0821 L atm / K mol.

Explanation:

6 0
3 years ago
Peppers have a white section that hold all of their seeds. There is a kind of chemical in the white region that triggers the "sp
notka56 [123]
Capsaicin is the chemical in the peppers, and then milk reverses it by using casein (A fat loving compound) to bond to the capsaicin and wash it away. Hope this helps!
4 0
3 years ago
Which of the following does not serve as a way to neutralize the charge in a body?
MrRa [10]

Answer:

B. Adding more protons to a positively charged body until the number of protons matches the number of electrons.

Explanation:

7 0
3 years ago
The pressure in car tires is often measured in pounds per square inch ( lb/in.2 ), with the recommended pressure being in the ra
Goshia [24]

when we convert 32.5 lb/in² to atmosphere, the result obtained is 2.21 atm

<h3>Conversion scale</h3>

14.6959 lb/in² = 1 atm

<h3>Data obtained from the question</h3>
  • Pressure (in lb/in²) = 32.5 lb/in²
  • Pressure (in ATM) =?

<h3>How to convert 32.5 lb/in² to atm</h3>

14.6959 lb/in² = 1 atm

Therefore

32.5 lb/in² = 32.5 / 14.6959

32.5 lb/in² = 2.21 atm

Thus, 32.5 lb/in² is equivalent to 2.21 atm

Learn more about conversion:

brainly.com/question/2139943

#SPJ1

4 0
2 years ago
The molar solubility of ag2s is 1.26 × 10-16 m in pure water. calculate the ksp for ag2s.
MAXImum [283]
Answer is: Ksp for silver sulfide is 8.00·10⁻⁴⁸.
Reaction of dissociation: Ag₂S(s) → 2Ag⁺(aq) + S²⁻(aq)<span>.
</span>s(Ag₂S) = s(S²⁻) = 1.26·10⁻¹⁶ M.
s(Ag⁺) = 2s(Ag₂S) = 2.52·10⁻¹⁶ M; equilibrium concentration of silver cations.
Ksp = s(Ag⁺)² · s(S²⁻).
Ksp = (2.52·10⁻¹⁶ M)² · 1.26·10⁻¹⁶ M.
Ksp = 6.35·10⁻³² M² · 1.26·10⁻¹⁶ M.
Ksp = 8.00·10⁻⁴⁸ M³.
6 0
3 years ago
Other questions:
  • Match the atoms which might substitute for one another. Match the items in the left column to the items in the right column.
    8·2 answers
  • When glycogen is broken down into sugar what type of reaction occurs?
    12·1 answer
  • Relationship between the variables of Pressure and Temperature of a gas?
    5·1 answer
  • What are the 5 phases of matter?
    8·1 answer
  • 3)<br> _C2H4O2 + _ 02 → _ CO2 + _ H2O
    12·1 answer
  • Determina a quantidade da agua produzida quando 20 gramas de H2 reage com 8 gramas de O2? a) Indique o reagente limitante ? b) D
    12·1 answer
  • Someone please HELPPPP
    5·1 answer
  • A sample of a gas is in a sealed container. The pressure of the gas is 565 torr , and the temperature is 27 ∘C . If the temperat
    12·1 answer
  • If 8.25 grams of lead II nitrate reacts, how many grans of sodium nitrate is produced?
    14·1 answer
  • Q1. The equation for the reaction between sulfur dioxide and oxygen is shown.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!