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
Alik [6]
3 years ago
13

The combustion of ethene in the presence of excess oxygen yields carbon dioxide and water: c2h4 (g) + 3o2 (g) → 2co2 (g) + 2h2o

(l) the value of δs° for this reaction is ________ j/k⋅mol.
Chemistry
1 answer:
meriva3 years ago
3 0

Answer:

\boxed{-267.5}

Explanation:

You can calculate the entropy change of a reaction by using the standard molar entropies of reactants and products.

The formula is

\Delta_{r} S^{\circ} = \sum_n {nS_{\text{products}}^{\circ} - \sum_{m} {mS_{\text{reactants}}^{\circ}}}

The equation for the reaction is

                        C₂H₄(g) + 3O₂(g) ⟶ 2CO₂(g) + 2H₂O(ℓ)

ΔS°/J·K⁻¹mol⁻¹   219.5      205.0         213.6         69.9

\Delta_{r} S^{\circ} = (2\times213.6 + 2\times69.9) - (1\times219.5 + 3\times205.0)\\\\= 567.0 - 834.5 = \boxed{-267.5 \text{ J}\cdot\text{K}^{-1} \text{mol}^{-1}}

You might be interested in
Disintegration is the word geologists use forA.When a rock becomes moist.B.When rock is physically broken into smaller pieces.C.
Jlenok [28]
C would be the best answer because its the most logical one
7 0
3 years ago
How much heat has been lost when a 78 g piece of copper is placed into a calorimeter and cools from 120°C to
lora16 [44]

The amount of heat lost by the copper is 2402.4 J.

To Calculate the amount of heat lost, we use the formula below.

<h3>Formula:</h3>
  • Q = cm(t₂-t₁)................. Equation 1

<h3>Where:</h3>
  • Q = Amount of heat lost
  • c = specific heat capacity of copper
  • m = mass of copper
  • t₂ = Final temperature
  • t₁ = Initial temperature

From the question,

<h3>Given:</h3>
  • m = 78 g
  • c = 0.385 J/g°C
  • t₂ = 120°C
  • t₁ = 40°C

Substitute these values into equation 1.

  • Q = 78(0.385)(120-40)
  • Q = 2402.4 J

Hence, The heat lost by the copper is 2402.4 J

Learn more about heat here: brainly.com/question/13439286

3 0
2 years ago
Explain why the air inside of the balloon has more pressure than the air outside.
julia-pushkina [17]

Answer:

its more condensed

Explanation:

6 0
3 years ago
A lightning strike from the air may have started the fire by igniting dry vegetation. This example demonstrates interaction betw
MArishka [77]

Answer:

Atmosphere and Biosphere

Explanation:

8 0
3 years ago
What color does copper produce when it reacts to chlorine
kiruha [24]

The color it produces is Bright green.

6 0
3 years ago
Other questions:
  • The _____ biome is the driest. Common floras are cacti, and faunas are snakes and lizards.
    7·2 answers
  • What is one use of the mineral gypsum fertilizer medicine wallboard electrical insulator
    14·2 answers
  • Which of the following best describes an atom? * the smallest unit of living things only the smallest unit of an element the sma
    5·1 answer
  • SOME HELP WOULD BE NICE!!! PLEASEEE
    11·1 answer
  • In pea plants, yellow seeds are dominant to green seeds. A heterozygous yellow-
    7·1 answer
  • 1. Determine the volume of SO2 (at STP) formed from the reaction of 96.7 mol FeS2 and 55.0 L of O2 at 358 K and 1.20 atm.
    13·1 answer
  • Calculate the pressure in atmospheres of O2 gas at 35 degrees Celsius. It is in a .5 liter container
    14·1 answer
  • Lead (II) nitrate and magnesium iodide solutions are mixed
    6·1 answer
  • Please help fast please please
    14·1 answer
  • How many molecules are contained in 2.34 moles of carbon monoxide?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!