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
kumpel [21]
3 years ago
15

An experiment to measure the enthalpy change for the reaction of aqueous

Chemistry
1 answer:
Komok [63]3 years ago
8 0

Given that, an experiment to measure the enthalpy change for the reaction of aqueous copper(II) sulfate, CuSO4(aq) and zinc, Zn(s) was carried out in a coffee cup calorimeter; the heat of the reaction in the whole system is calculated to be 2218.34 kJ

Heat of reaction (i.e enthalpy of reaction) is the quantity of heat that is required to be added or removed when a chemical reaction is taken place in order to maintain all of the compounds present at the same temperature.

The formula used to calculate the heat of the reaction can be expressed as follows:

Q = mcΔT

where:

  • Q = quantity of heat transfer
  • m = mass
  • c = specific heat of water = 4.18 kJ/g °C (constant)
  • ΔT = change in temparature

From the information given:

  • The initial temperature (T₁) = 25° C
  • The final temperature (T₂) = 91.5° C

∴

The change in temperature i.e. ΔT = T₂ - T₁

ΔT = 91.5° C - 25° C

ΔT = 66.5° C

The number of moles of CuSO₄ = 1.00 mol/dm³ × 50.0 cm³

\mathbf{= (1 \times \dfrac{50}{1000})\ moles}

= 0.05 moles

  • Since the molar mass of CuSO₄ = 159.609 g/mol

Then;

Using the relation:

\mathbf{number \ of \ moles = \dfrac{mass}{molar \ mass}}}

By crossing multiplying;

mass of CuSO₄ = number of moles of CuSO₄ ×  molar mass of CuSO₄

mass of CuSO₄ = 0.05 moles  × 159.609 g/moles

mass of CuSO₄ = 7.9805 grams

∴

Using the formula from above:

Q = mcΔT

Q = 7.9805 g × 4.18 kJ/g °C × 66.5° C

Q = 2218.34 kJ

Therefore, we can conclude that the heat of the reaction is 2218.34 kJ

Learn more about the chemical reaction here:

brainly.com/question/20250226?referrer=searchResults

You might be interested in
What are the coordinates of the midpoint of the line segment with endpoints (2, 5) and (4, -7)?
Lena [83]

Answer:

(3,2)

Explanation:

The x-co-ordinates above are 2 and 4

Their midpoint is 2+4/2

The y-co-ordinates above are 5 and -1

Their midpoint is 5+(-1)/2  = 2

The overall midpoint is (3,2)

6 0
3 years ago
Match the prefix with the power of ten it represents.
Sunny_sXe [5.5K]

kilo 103 is the correct answer so it would mostly be 2

6 0
3 years ago
Read 2 more answers
Scientists gather information to understand why and where earthquakes happen. What is the name of the machine that helps them me
creativ13 [48]
There are two scales, one is a Ritcher scale and another one is called a Mercalli scale.
6 0
3 years ago
Gloria’s family built a new deck using building materials made from recycled plastic bottles. As they were heated, the plastics
steposvetlana [31]

Answer:2

Explanation:

6 0
3 years ago
The following solutions are prepared by dissolving the requisite amount of solute in water to obtain the desired concentrations.
lions [1.4K]

Answer:

1M MgCl₂ > 1M KCl > 1M C₁₂H₂₂O₁₁

Explanation:

The osmotic pressure (π) is the pressure needed to impede the osmose, it means that it's the necessary pressure to prevent the solvent to go through a membrane.

It can be calculated by:

π = M*R*T*i

Where M is the molarity of the solution (mol/L), R is the ideal gas constant, T is the temperature, and i the van't Hoff factor.

This factor is a way to correct the number of particles that are dissolved in a solute, and it can be calculated by:

i = 1 + α*(q - 1)

Where α is the degree of dissociation of a substance, and q is the number of moles of each ion released in a solution. Thus, covalent compounds that didn't ionize, such as sugars, have only one particle, and q = 1, and so i =1.

Because all the substances have the same molarity (1 M) and are at the same temperature, let's analyze the value of i, which is directly proportional to π.

C₁₂H₂₂O₁₁ is a sugar that didn't ionize, so π = 1;

Both KCl and MgCl₂ are soluble salts and will dissociate completely (α = 1), but MgCl₂ will have 3 particles (Mg²⁺ + 2Cl⁻), and KCl only one particle (K⁺ and Cl⁻), so qMgCl₂ > 1KCl, and so πMgCl₂ > πKCl, which will be higher than 1.

1M MgCl₂ > 1M KCl > 1M C₁₂H₂₂O₁₁

5 0
3 years ago
Other questions:
  • Using the periodic table, how would you find elements with chemical properties similar to helium?
    15·1 answer
  • The vapor pressure of water at 25.0 oc is 23.8 torr. determine the mass of glucose (molar mass = 180. g/mol) needed to add to 27
    12·1 answer
  • How many elements are in 2CaCO3 and C8H10N402
    5·1 answer
  • How many atoms in 134 moles of an element B?
    15·2 answers
  • "CU" is a pair of letters the element we call "copper".
    5·1 answer
  • A solution of salt water is boiled. The water evaporates and solid salt remains. Which statement is true?
    13·2 answers
  • How many protons are in the nucleus of an atom with an atomic number of 15?
    8·1 answer
  • Intermolecular forces exist between what?
    13·1 answer
  • Draw the structural formula for dipeptide Pro-phe
    10·1 answer
  • . an ionic compound is composed of 34.95 g of iron and 15.05 g of oxygen. find the empirical formula of this compound.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!