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
Scorpion4ik [409]
3 years ago
12

How much solution could be heated to boiling by the heat evolved by the dissolution of 24.0 g of naoh? (for the solution, assume

a heat capacity of 4.0 j/g⋅∘c, an initial temperature of 25.0 ∘c, a boiling point of 100.0 ∘c, and a density of 1.05 g/ml.)?
Chemistry
1 answer:
ozzi3 years ago
5 0
<span>Sodium hydroxide (NaOH) has a lattice energy of -887 kJ/mol and a heat of hydration of -932 kJ/mol.
Heat of </span><span>dissolution of 1 mol of NaOH is 887 kJ/mol - 932 kJ/mol = -45 kJ/mol.
m(NaOH) = 24 g.
n</span>(NaOH) = 24 g ÷ 40g/mol = 0,6 mol.
ΔT = 100°C - 25°C = 75°C.
Heat of dissolution of 0,6 mol of NaOH is -45 kJ/mol · 0,6 mol = -27 kJ.
27000 J = m · 4 J/g·°C · 75°C.
m(NaOH) = 90 g of solution.
d = m÷V, V = 90 g ÷ 1,05 g/ml = 85,7 ml.
You might be interested in
Rutherford proposed that atoms have positive nuclei. Which statement correctly describes the nucleus of an atom?
kondor19780726 [428]
I think that The answer is B
7 0
3 years ago
Read 2 more answers
Temperature is _____ to the average kinetic energy of a gas.
d1i1m1o1n [39]

Answer: Option (b) is the correct answer.

Explanation:

As on increasing the temperature, the molecules gain more kinetic energy due to which they tend to collide and move rapidly from one place to another.  

Thus, we can conclude that when temperature is increased, the kinetic energy of the molecules increases.

This means that temperature is directly proportional to the average kinetic energy of a gas.

8 0
2 years ago
Read 2 more answers
There are two physical properties of minerals that both result in smooth, flat surfaces with specific angles between them. The f
stich3 [128]

Answer:

3. crystal habit and cleavage.

Explanation:

Crystal habit is a distinctive characteristic which is shown in its general shape,  crystallographic forms, how developed each form is.

Cleavage is the ability of a mineral to break in smooth planes parallel to zones of weak bonding. Cleavage in three directions at right angles (90o). Cubic cleavage. Cleavage in three directions not at right angles (120o and 60o).

3 0
3 years ago
Can someone please help me understand this?
Nataliya [291]

Answer:

French physicist Jacques Charles (1746-1823) studied the effect of temperature on the volume of a gas at constant pressure. Charles's Law states that the volume of a given mass of gas varies directly with the absolute temperature of the gas when pressure is kept constant. The absolute temperature is temperature measured with the Kelvin scale. The Kelvin scale must be used because zero on the Kelvin scale corresponds to a complete stop of molecular motion.

alt

Figure 11.5.1: As a container of confined gas is heated, its molecules increase in kinetic energy and push the movable piston outward, resulting in an increase in volume.

Mathematically, the direct relationship of Charles's Law can be represented by the following equation:

V

T

=k

As with Boyle's Law, k is constant only for a given gas sample. The table below shows temperature and volume data for a set amount of gas at a constant pressure. The third column is the constant for this particular data set and is always equal to the volume divided by the Kelvin temperature.

Explanation:

PLEASS MARK ME AS BRAINLIEST ANSWER

4 0
3 years ago
How many grams of aluminum will be deposited by 0.1F? (Al=27) a.0.3g b. 0.9. c. 9.0g. d. 2.7g<br>​
andrezito [222]

Based on the charge on the aluminium ion, 0.9 g of aluminium are deposited by 0.1 F of electricity.

<h3>What is electrolysis?</h3>

Electrolysis is the decomposition of a substance known as an electrolyte when electric current is passed through it.

The mass and hence moles an electrolyte deposited when current is passed through it depends on the charge on the ion.

Aluminium ion has a charge of +3 and requires 3F of electricity to deposit 1 mole or 27 g of aluminium

0.1 F will discharge = 0.1/3 × 27 g of aluminium

mass of aluminium deposited = 0.9 g of aluminium.

Therefore, 0.9 g of aluminium are deposited by 0.1 F of electricity.

Learn more about electrolysis at: brainly.com/question/26050361

5 0
2 years ago
Other questions:
  • Can someone tell me how to do a full chemical equation with balancing and everything?
    9·1 answer
  • How does an organism grow and change throughout its life
    12·1 answer
  • 6.The combustion reaction of the amino acid glycine (NH2CH2COOH, solid) has a standard enthalpy of –969 kJ/mol at 298K, and a st
    15·1 answer
  • The molar mass of an element is the mass of one
    7·1 answer
  • What does 2,3-dibromopentane look like?
    13·1 answer
  • Which fossil fuel is the remains of ancient plants?<br> A. Coal<br> B. Petroleum<br> C. Natural Gas
    8·2 answers
  • Which of the following are considered physical changes?
    13·1 answer
  • HELP PLEASEEEEE we dissolved Alka-Seltzer in water and the mass decreased about 0.13g
    11·1 answer
  • A hydrogel is composed of crosslinked polymer chains, which are highly water absorbent. The gels are mostly (mostly&gt;90%) wate
    8·1 answer
  • In a star, nuclear fusion occurs in the
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!