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
Sloan [31]
3 years ago
9

When C2H6(g) reacts with O2(g) according to the following reaction, 1.43×103 kJ of energy are evolved for each mole of C2H6(g) t

hat reacts. Complete the following thermochemical equation.
2C2H6(g) + 7O2(g)---------->4CO2(g) + 6H2O(g) DeltaH = _____kJ
Chemistry
1 answer:
dezoksy [38]3 years ago
8 0

Answer:

-2.86x10³ kJ

Explanation:

The enthalpy of a reaction (ΔH) is defined as the heat produced or consumed by a reaction. In the reaction:

2 C₂H₆(g) + 7 O₂(g) → 4 CO₂(g) + 6 H₂O(g)

The ΔH is the heat envolved in the reaction per 2 moles of C₂H₆. 1.43x10³ kJ are involved when 1 mole reacts. Thus, when 2 moles react, involved heat is:

1.43x10³ kJ ₓ 2 = <em>2.86x10³ kJ</em>. As the reaction is a combustion reaction (Produce CO₂ and H₂O), the heat involved in the reaction is <em>PRODUCED, </em>that means ΔH is negative, <em>-2.86x10³ kJ</em>

You might be interested in
Which choice represents a compound?Required to answer. Single choice.
Citrus2011 [14]

Answer:

CO

Explanation:

Elements will only one capital letter, that may/may not have a lower case letter after it. CO has a capital letter followed by another capital, so it's a compound

8 0
3 years ago
g A high altitude balloon is filled with 1.41 x 104 L of hydrogen gas (H2) at a temperature of 21oC and a pressure of 745 torr.
Tamiku [17]

Answer:

1.27 × 10⁵ L

Explanation:

Step 1: Given data

  • Initial pressure (P₁): 745 Torr
  • Initial volume (V₁): 1.41 × 10⁴ L
  • Inital temperature (T₁): 21 °C
  • Final pressure (P₂): 63.1 Torr
  • Final volume (V₂): ?
  • Final temperature (T₂): -48 °C

Step 2: Convert the temperatures to the Kelvin scale

We will use the following expression.

K = °C + 273.15

K = 21 °C + 273.15 = 294 K

K = -48 °C + 273.15 = 225 K

Step 3: Calculate the final volume of the balloon

We will use the combined gas law.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

V₂ = P₁ × V₁ × T₂/ T₁ × P₂

V₂ = 745 Torr × 1.41 × 10⁴ L × 225 K/ 294 K × 63.1 Torr

V₂ = 1.27 × 10⁵ L

6 0
2 years ago
Describe the reason why a reaction between two substances comes to an end.
Shtirlitz [24]

Answer: The process by which a particular substance or different substances are transformed to another is called as Chemical Reaction.One reason, in the case of reversible reactions could be that the reaction reached equilibrium before the reaction was complete.Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.The concentration of reactants decreases as the reaction proceeds and at last their concentration comes to an end. Hence, the reaction stops too. If two reactants are being reacted, then the reactant which is in limited amount will consume first and will result in the termination of reaction.The usual reason is that one (or more) of the reactants gets used up.

Hope that was helpful.Thank you!!!

8 0
3 years ago
1. The molar mass of BeF2
oksano4ka [1.4K]

Answer:

47.01 g/mol is molar mass

8 0
3 years ago
The layer of the Earth that the lithospheric plates move on top of is called the
ikadub [295]

Answer:

A. Lithosphere

4 0
3 years ago
Other questions:
  • Which of the following is the general formula for a double replacement reaction?
    12·1 answer
  • Discuss the relationship between amount of energy and the color of light produced by excited electrons
    10·1 answer
  • If 1.0 atm = 760 mm Hg, how many mm Hg are in 1.05 atm?
    8·1 answer
  • Ammonia (NH3) boils at -33∘C; at this temperature it has a density of 0.81 g/cm3. The enthalpy of formation of NH3(g) is -46.2 k
    11·1 answer
  • What is the molality of a solution made by dissolving 137.9g of sucrose in 414.1g of water? The density of the solution is 1.104
    11·1 answer
  • Describe the composition of a molecular compound. What are two major characteristics of molecular compounds?
    7·1 answer
  • Directions: Fill in the blanks to complete the idea. 1. Constellations are group of that form pattems in the night sky 2. Ursa M
    12·1 answer
  • HELP FASTTT
    6·1 answer
  • PLEASE HELP QUICKLY THANK YOU
    8·2 answers
  • Why are environmental factors important to consider when assessing an individual’s health? a. environmental factors are the sole
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!