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
Lelechka [254]
3 years ago
12

Use the molar bond enthalpy data in the table to estimate the value of Δ∘rxn

Chemistry
2 answers:
likoan [24]3 years ago
6 0

Answer:

-420

Explanation:

MakcuM [25]3 years ago
4 0

Answer:

ΔH°rxn = - 433.1 KJ/mol

Explanation:

  • CH4(g) + 4Cl2(g) → CCl4(g) + 4HCl(g)

⇒ ΔH°rxn = 4ΔH°HCl(g) + ΔH°CCl4(g) - 4ΔH°Cl2(g) - ΔH°CH4(g)

∴ ΔH°Cl2(g) = 0 KJ/mol.....pure element in its reference state

∴ ΔH°CCl4(g) = - 138.7 KJ/mol

∴ ΔH°HCl(g) = - 92.3 KJ/mol

∴ ΔH°CH4(g) = - 74.8 KJ/mol

⇒ ΔH°rxn = 4(- 92.3 KJ/mol) + (- 138.7 KJ/mol) - 4(0 KJ/mol) - (- 74.8 KJ/mol)

⇒  ΔH°rxn = - 369.2 KJ/mol - 138.7 KJ/mol - 0 KJ/mol + 74.8 KJ/mol

⇒ ΔH°rxn = - 433.1 KJ/mol

You might be interested in
How many miles are there if you have 70.5g of Nacl
GenaCL600 [577]
70.5g x 1 mol / 58.5g = 1.2mol of nacl
4 0
2 years ago
Which processes represent one chemical change in one physical change
prisoha [69]

 decomposition and melting

7 0
3 years ago
Read 2 more answers
A certain chemical reaction releases 36.2 kJ/g of heat for each gram of reactant consumed. How can you calculate what mass of re
Lilit [14]

Answer:

0.038 g of reactant

Explanation:

Data given:

Heat release for each gram of reactant consumption = 36.2 kJ/g

mass of reactant that release 1360 J of heat = ?

Solution:

As  36.2 kJ of heat release per gram of reactant consumption so first we will convert KJ to J

As we know

1 KJ = 1000 J

So

36.2 kJ = 36.2 x 1000 = 36200 J

So it means that in chemical reaction 36200 J of heat release for each gram of reactant consumed so how much mass of reactant will be consumed if 1360 J heat will release

Apply unity formula

                 36200 J of heat release ≅ 1 gram of reactant

                 1360 J of heat release ≅ X gram of reactant

Do cross multiplication

              X gram of reactant = 1 g x 1360 J / 36200 J

              X gram of reactant = 0.038 g

So 0.038 g of reactant will produce 1360 J of heat.

5 0
3 years ago
What is the ph of a 0.01 m solution of the strong acid hno3 in water?
kumpel [21]
Answer is: pH <span>of a 0,01 M solution is 2.
c(HNO</span>₃) = 0,01 M = 0,01 mol/L.
pH = -log(c(HNO₃).
pH = -log(0,01 mol/L).
pH = 2.
pH<span> is a numeric scale used to specify the </span>acidity<span> or </span>basicity<span> of an </span>aqueous solution<span>. If pH is less than seven, than solution is acidic and if pH is greater seven, solution is basic, if pH is equal seven, solution is neutral.</span>
6 0
2 years ago
Read 2 more answers
For every action there is an equal and opposite reaction is known as? *
wolverine [178]

Answer:

Newton's third law

3 0
2 years ago
Read 2 more answers
Other questions:
  • Which processes lead to the formation of the distorted, wavy patterns found in metamorphic rock?
    10·1 answer
  • Calculate the temperature change in the water upon the complete melting of the ice. Assume that all of the energy required to me
    8·1 answer
  • How many atoms are in 0.750 moles of zinc?
    11·1 answer
  • A buffer is prepared by mixing 204.0 mL of 0.452 M HCl and 0.500 L of 0.400 M sodium acetate (NaC2H3O2):
    13·1 answer
  • what will happen to the initial rate of the reaction if the concentration of iron(III) chloride is tripled
    11·1 answer
  • Inquiry Extension Consider a reaction that occurs between solid potassium and chlorine gas. If you start with an initial mass of
    11·1 answer
  • CH4 + 2 O2 → CO2 + 2 H2O
    12·1 answer
  • What is the speed of a wave on a guitar string with a mass of
    9·1 answer
  • Why is water sometimes called the ""universal solvent?"".
    7·1 answer
  • A student added 3 g of melted wax to a container that weighed 15 g. What is the weight of the container after the wax hardens?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!