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
almond37 [142]
3 years ago
12

Using standard heats of formation, calculate the standard enthalpy change for the following reaction.

Chemistry
1 answer:
Katena32 [7]3 years ago
4 0

Answer:

ΔH°r = -483.64 kJ

Explanation:

Let's consider the following balanced equation.

2 H₂(g) + O₂(g)  ⇒ 2 H₂O(g)

We can calculate the standard enthalpy change of the reaction (ΔH°r) using the following expression.

ΔH°r = ∑ΔH°f(p) × np - ∑ΔH°f(r) × nr

where

ΔH°f: standard heat of formation

n: moles

p: products

r: reactants

ΔH°r = ΔH°f(H₂O(g)) × 2 mol - ΔH°f(H₂(g)) × 2 mol - ΔH°f(O₂(g)) × 1 mol

ΔH°r = (-241.82 kJ/mol) × 2 mol - 0 kJ/mol × 2 mol - 0 kJ/mol × 1 mol

ΔH°r = -483.64 kJ

You might be interested in
I NEED THIS ASAP ILL GIVE BRAINLIEST
zalisa [80]
The black fur absorbs all the colors where the white fun reflects all the colors because we see the green grass it absorbs all the colors except green and the yellow dandelion is reflecting yellow and orange because it’s color is like a mix of them but it still absorbs the other colors
4 0
3 years ago
Read 2 more answers
Which substances will make a salt when combined?
babymother [125]
The answer is D. Fertilizer and vinegar
3 0
3 years ago
Read 2 more answers
How many valence electrons does calcium want to gain or lose to have a full outer shell?
grandymaker [24]

Explanation:

For example, Identify the number and type of ions formed in a reaction of calcium and carbon. Step 1: Determine the number of valence electrons for each element and whether the element loses or gains electrons. Calcium has 2 valence electrons and is a metal so it will give up two electrons.

4 0
3 years ago
Read 2 more answers
What type of reaction is Ni + MgSo4
kumpel [21]
Chemical- it produces ammonia.
4 0
3 years ago
This is a material that transmits most of the light that strikes to pass through and only a small amount of light is reflected o
inn [45]

Answer:

Optically Transparent

7 0
3 years ago
Other questions:
  • I need somebody to help me with my homework pls i dont get it .
    15·1 answer
  • A ________ is an electric circuit that produces a magnetic field
    13·1 answer
  • Follow the Carbon in Citric Acid Cycle: 1. How many cycles does it take to convert Acetyl CoA to CO2
    8·1 answer
  • The symbol for hydronium ion concentration is
    14·1 answer
  • What days did the Catholic Church h celebrate with fireworks
    7·2 answers
  • What is the point of doing an experiment. Help thank you​
    10·2 answers
  • What is the volume of 62.0 g of ether if the density of ether is 0.56 g/mL?
    5·1 answer
  • Give types of salts and one example each<br>​
    5·1 answer
  • 19.60g of phosphoric acid is neutralized by 500g solution of sodium hydroxide.
    5·2 answers
  • In a particular redox reaction, no−2no2− is oxidized to no−3no3− and fe3 fe3 is reduced to fe2 fe2. complete and balance the equ
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!