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
umka21 [38]
3 years ago
11

2. Determine the heat of reaction (AH,xn) for the process by which hydrazine (N2H4)

Chemistry
1 answer:
inessss [21]3 years ago
8 0

The heat of reaction : 50.6 kJ

<h3>Further explanation</h3>

Based on the principle of Hess's Law, the change in enthalpy of a reaction will be the same even though it is through several stages or ways

Reaction

N₂(g) + 2H₂(g) ⇒N₂H₄(l)

thermochemical data:

1. N₂H₄(l)+O₂(g)⇒N₂(g)+2H₂O(l)   ΔH=-622.2 kJ

2. H₂(g)+1/2O₂(g)⇒H₂O(l)  ΔH=-285.8 kJ

We arrange the position of the elements / compounds so that they correspond to the main reaction, and the enthalpy sign will also change

1. N₂(g)+H₂O(l) ⇒  N₂H₄(l)+O₂(g) ΔH=+622.2 kJ

2. H₂(g)+1/2O₂(g)⇒H₂O(l)  ΔH=-285.8 kJ x 2 ⇒

2H₂(g)+O₂(g)⇒2H₂O(l)  ΔH=-571.6 kJ

Add reaction 1 and reaction 2, and remove the same compound from different sides

1. N₂(g)+2H₂O(l) ⇒  N₂H₄(l)+O₂(g) ΔH=+622.2 kJ

2.2H₂(g)+O₂(g)⇒2H₂O(l)            ΔH=-571.6 kJ

-------------------------------------------------------------------- +

N₂(g) + 2H₂(g) ⇒N₂H₄(l)   ΔH=50.6 kJ

You might be interested in
In which 2 states of matter can a substance take the shape of its container?
Natasha2012 [34]

Answer:

solid and liquid

Explanation:

5 0
3 years ago
Read 2 more answers
Chuẩn Độ 15 ml dung dịch CH3COOH 0,2 m bằng dung dịch NaOH 0,2 m
mina [271]

Answer:

<h3>I don't know what is the answer of your question sorry never mind..</h3>

Explanation:

<h3>And please marks me as brainliest... </h3>
3 0
3 years ago
Does a reptile play the same role as a bird in the WNV???<br> PLZ HURRY PLZ
Slav-nsk [51]
The birds could have more diseases and could pass it to other reptiles
7 0
3 years ago
Compare the spectra produced by incandescent and fluorescent sources. Why is there a difference?
Inessa [10]
Both have a continuous light spectra the fluorescent source makes a spectra with more intense bands of mercury
<span />
5 0
3 years ago
Read 2 more answers
Which sample has particles with the lowest average kinetic energy?
Anastasy [175]
The question asks average kinetic energy. So it is only related with the temperature. The higher temperature is, the higher kinetic energy is. So the answer is (4).
3 0
3 years ago
Read 2 more answers
Other questions:
  • Covalent bonds form between hydrogen and oxygen atoms in a water molecule as a result of the:
    6·1 answer
  • Based on the knowledge about genetic links between organisms, which category of classification was added to Linnaean Taxonomy?
    12·2 answers
  • How many Fe atoms and how many moles of Fe atoms are in 500.g of iron?
    14·1 answer
  • Identify the Brønsted acid in the following equation:<br> H2SO4(aq) + 2NH3(aq)<br> (NH4)2SO4aq
    6·1 answer
  • Describe how cloning can be a social issue and give rise to moral, ethical and legal debates. Justify your response in two or mo
    15·1 answer
  • Which pair of atoms is held together by a covalent bond HCl LiCl NaCl KCl​
    11·1 answer
  • Please help with this question!
    5·1 answer
  • Which do you think will warm up the plate more quickly?
    9·1 answer
  • Which type of prevailing wind would carry more water vapor (humidity)? (Choose one)
    13·1 answer
  • How did the mass change when the copper coin was made to look silver?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!