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
Paul [167]
3 years ago
11

Look at the potential energy diagram for a chemical reaction.

Chemistry
1 answer:
vladimir1956 [14]3 years ago
8 0

Answer: The activation energy is 10 kJ and the reaction is exothermic.

Explanation: Exothermic reactions are those in which heat is released and thus the energy of products is less than the energy of reactants.

Endothermic reactions are those in which heat is absorbed and thus the energy of products is more than the energy of reactants.

Activation energy is the extra amount of energy required by the reactants to cross the energy barrier to convert to products.

Given : Energy of reactants = 40kJ

Energy of activation: (50-40)=10 kJ

Energy of products = 50 kJ

Energy of products = 15 kJ

Thus Energy of products (15kJ) < Energy of reactants(40kJ), the reaction is exothermic as energy has been lost to surroundings in the form of heat.

You might be interested in
How to describe a ufo??​
erastova [34]

Answer:

Unidentified flying object or fly saucer.

Explanation:

6 0
3 years ago
Read 2 more answers
Read the following chemical equation.
elena55 [62]

Answer:

Iron gains three electrons.

5 0
4 years ago
What is the hydronium ion concentration of a 0.100 M acetic acid solution with Ka = 1.8 × 10-5? The equation for the dissociatio
evablogger [386]

Answer:

1.3×10⁻³ M

Explanation:

Hello,

In this case, given the dissociation reaction of acetic acid:

CH_3CO_2H(aq) + H_2O(l) \rightleftharpoons H_3O^+(aq) + CH_3CO_2^-(aq)

We can write the law of mass action for it:

Ka=\frac{[H_3O^+][CH_3CO_2^-]}{[CH_3CO_2H]}

Of course, excluding the water as heterogeneous substances are not included. Then, in terms of the change x due to the dissociation extent, we are able to rewrite it as shown below:

1.8x10^{-5}=\frac{x*x}{0.100-x}

Thus, via the quadratic equation or solve, we obtain the following solutions:

x_1=-0.00135M\\x_2=0.00133M

Obviously, the solution is 0.00133M which match with the hydronium concentration, thus, answer is: 1.3×10⁻³ M in scientific notation.

Regards.

8 0
4 years ago
Read 2 more answers
Determine how much energy is needed to change 50 g of liquid water at 100°C to steam.
marin [14]

Answer:

Q=113,000J

Explanation:

Hello there!

In this case, since the vaporization process is carried out in order to turn a liquid into a gas due to the addition of heat, we can use the following heat equation involving the heat of vaporization of water or any other substance:

Q=m*\Delta _{vap}H

Thus, since this heat of vaporization for water is 2259.36 J/g, we plug in this amount to obtain the total energy for this process.

Q=50*2259.36 J/g\\\\Q=113,000J

Which is positive due to the necessity of heat.

Regards!

5 0
3 years ago
A student uses a sample of KOH stock solution and dilutes it to a total of 120 mL. If the diluted solution is 0.60 M KOH and its
Vesnalui [34]

Answer:

5.5

Explanation:

i think so?????????

5 0
3 years ago
Other questions:
  • 1. (Blank) are the basic units of structure and function in living things.
    14·2 answers
  • The chemical symbol for a calcium ion is ca2 . what does the 2 symbolize
    11·1 answer
  • What is the correct interpretation of the mole ratios for the elements in
    6·2 answers
  • What type of bonding gains or loses an electron
    12·1 answer
  • Why is the atom neutrally charged?
    10·1 answer
  • How many moles of sodium hydroxide are there in 1.0mL of 2.0M NaOH
    11·1 answer
  • 2Na + 2H2O → 2NaOH+ H2<br><br> How many grams of H2 are produced if 120 g of Na react completely?
    14·1 answer
  • Two chemicals are mixed together and a gas is produced. *<br>chemical change <br>physical change ​
    10·1 answer
  • What is the frequency of an X-ray that has a wavelength of 1.5 x 10 -9 m? The speed of electromagnetic radiation is 3.0 x 10 8 m
    12·1 answer
  • What would the products of a double-replacement reaction between KBr and CaO be? (Remember: In double-replacement reactions, the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!