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
In-s [12.5K]
3 years ago
10

When pure sodium hydroxide is dissolved in water, heat is evolved. In a laboratory experiment to measure the molar heat of solut

ion of sodium hydroxide, the following procedure was followed. To a calorimeter containing 3.00 × 10^2 g of water at 20.00 °C, 10.65 g of NaOH, also at 20.00 °C was added. The temperature of the solution, which was monitored by a digital thermometer with negligible heat capacity, increased to 28.50 °C. If the specific heat of the mixture is 4.184 J g^-1 °C^-1, and the small heat capacity of the calorimeter is ignored, what is the heat evolved, per mole of sodium hydroxide?
Chemistry
1 answer:
katen-ka-za [31]3 years ago
7 0
The temp. increase was 8.50 degrees <span>C. (my b)
It requires 4.184J to increase the temp. of a 1g solution by 1 degrees </span><span>C.
Total heat required is 16,143J.
Molar Mass NaOH is 40g/mol
Evolved heat/mol NaOH = 51,045J.</span>
You might be interested in
Identifying map types
Darina [25.2K]

Answer:

Political Map. A political map shows the state and national boundaries of a place. ...

Explanation:

3 0
3 years ago
How does particle motion effect pressure
Alex
The pressure is a result of the motion of particles
8 0
3 years ago
Read 2 more answers
How are Kelvin scale and celcius scale similar <br>​
Alekssandra [29.7K]

Answer: The Kelvin scale is related to the Celsius scale. The difference between the freezing and boiling points of water is 100 degrees in each, so that the kelvin has the same magnitude as the degree Celsius.

Explanation:

Celsius is, or relates to, the Celsius temperature scale (previously known as the centigrade scale). The degree Celsius (symbol: °C) can refer to a specific temperature on the Celsius scale as well as serve as a unit increment to indicate a temperature interval(a difference between two temperatures or an uncertainty). “Celsius” is named after the Swedish astronomer Anders Celsius (1701-1744), who developed a similar temperature scale two years before his death.

K = °C + 273.15

°C = K − 273.15

Until 1954, 0 °C on the Celsius scale was defined as the melting point of ice and 100 °C was defined as the boiling point of water under a pressure of one standard atmosphere; this close equivalence is taught in schools today. However, the unit “degree Celsius” and the Celsius scale are currently, by international agreement, defined by two different points: absolute zero, and the triple point of specially prepared water. This definition also precisely relates the Celsius scale to the Kelvin scale, which is the SI base unit of temperature (symbol: K). Absolute zero—the temperature at which nothing could be colder and no heat energy remains in a substance—is defined as being precisely 0 K and −273.15 °C. The triple point of water is defined as being precisely 273.16 K and 0.01 °C.

7 0
3 years ago
How many moles are in 4561 g of C3H7OH?
d1i1m1o1n [39]

Answer: 76.017 moles

Explanation:

3 0
3 years ago
Helium is an odorless, colorless gas at room temperature. It is less dense than air. That's why helium balloons float. It is a n
Zolol [24]

Answer:

  • Non-flammable
  • It is the only element that doesn't solidify under ordinary pressure and remains a liquid enven at absolute zero.
  • When it electricity runs through helium it glows a pale peach color.
5 0
4 years ago
Other questions:
  • A plant dying after being exposed to poison represents a physical change true or false?
    6·2 answers
  • The balanced chemical equation, C (s) + O2 (g) CO2 (g), can be expressed in words as...
    6·2 answers
  • What is a farming example of mass?
    11·1 answer
  • What does it mean to have a control group
    8·2 answers
  • Which source of pollution is covered indirectly by the soil and water resources conservation act but excluded from the clean wat
    11·2 answers
  • Answers please :) i highly need them
    10·1 answer
  • IS IT BETTER OR WORSE TO WORKOUT/EXERCISE IN DARK OR LIGHT COLORED CLOTHING? ​
    11·2 answers
  • Question 1 (1 point)<br> ROOTS--What is NOT a root function in plants?
    12·1 answer
  • What is use in measuring
    7·2 answers
  • Identify parts A-E on the following energy diagram.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!