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
satela [25.4K]
3 years ago
14

Is the following a properly written thermochemical equation? 2C8H18 + 25O2 → 16CO2 + 18H2O, ΔH = –5,471 kJ/mol

Chemistry
1 answer:
Alex73 [517]3 years ago
8 0
I believe the the equation is correctly expressed. The reaction above is a combustion reaction of octane. All of the combustion reaction is known to be exothermic reactions that is they release heat as the reaction proceeds. Consequently, they have negative enthalpies.
You might be interested in
If 200 g of water is heated from 20 C to 40 C, then what is the heat added in kilocalories (same as food calories)?
Maslowich

Answer: 4Kcal

Explanation:

H= mcø

M=200g

C= 1 cal/g/°c

Ø= 40-20=20°c

H= 200*1*20= 4000calories= 4Kcal

8 0
2 years ago
Choose all the answers that apply. Plasma is made of _____.
andreev551 [17]
<span>'Plasma itself is made up of 91.5% water. It acts as a solvent for important proteins, nutrients, electrolytes, gases, and other substances essential to life.'

Source: </span><span>https://study.com/academy/lesson/what-is-blood-plasma-function-components.html

Hope this helps! :)</span>
5 0
3 years ago
Which of the following has the smallest heat capacity?
musickatia [10]
What are the options?
7 0
3 years ago
Read 2 more answers
Is mass conserved when 200 g of water undergoes a physical change? Use complete sentences to support your answer by explaining h
andrew-mc [135]

Answer:

-200

Explanation:

7 0
2 years ago
Combining hydrogen and oxygen to make water Group of answer choices releases a lot of energy. consumes a lot of energy. releases
Firdavs [7]

Answer:

Releases a lot of energy. When hydrogen a highly reactive element reacts with oxygen, it does so using immense force, when the bonds break high amounts of emery is released.

Explanation:

5 0
3 years ago
Other questions:
  • mage result for alz... Warm-Up Exercises for Chapter 2 - Acid-Base Reactions roblem 2.3 H2O is the acid and NH2 is the base. Exp
    6·1 answer
  • The flamability (burns) is a physical change ?
    10·2 answers
  • 2. Which one of the following chemical equations is balanced? A. 2NaCl + H2SO4 → HCL + NaSO4 B. NH3 + H2O → 2NH4OH C. 2Na + S →
    7·2 answers
  • Which equation represents the combined gas law?
    13·1 answer
  • A sample of tin (Cp = 0.227 J/g•°C) is placed in a freezer. Its temperature decreases from 15.0°C to −10.0°C as it releases 543
    8·2 answers
  • An irregular shaped sample of aluminum is put on a balance and found
    15·1 answer
  • In 1906, there was a small population of deer on the Kaibab Plateau. Because cows had overgrazed the food on the Kaibab Plateau,
    9·1 answer
  • Place the particles in order from smallest to largest.
    14·1 answer
  • Find the mass (in g) of 1.00 atom of lead.
    7·1 answer
  • Un compuesto químico se puede representar gráficamente por medio de una
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!