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
otez555 [7]
3 years ago
5

Classify each reaction as endothermic or exothermic.

Chemistry
2 answers:
evablogger [386]3 years ago
7 0

H2 + Br2 → 2HBr, ΔH = -73 kJ    Exothermic

2NH3 → N2 + 3H2, ΔH = 92 kJ     Endothermic

CH4 + 2O2 → CO2 + 2H2O, ΔH = -890 kJ     Exothermic

2HCl → H2 + Cl2, ΔH = 184 kJ         Endothermic

Alik [6]3 years ago
5 0

The correct answers are

Exothermic:

H2 + Br2 → 2HBr, ΔH = -73 kJ    

CH4 + 2O2 → CO2 + 2H2O, ΔH = -890 kJ

Endothermic

2NH3 → N2 + 3H2, ΔH = 92 kJ    

2HCl → H2 + Cl2, ΔH = 184 kJ    

:)  

You might be interested in
Explain why you hear a “whoosh” sound when you open a can containing a carbonated drink. Which gas law applies?
Lana71 [14]

Carbonated drinks have the air under pressure so that carbon bubbles are forced into the drink, keeping it carbonated. So when you open a can, the air under pressure in the can comes out of the can at a high speed, making a "whooshing" sound. The gas law that applies to this concept is the Boyle's Law (PV=k or P1V1=P2V2).

6 0
3 years ago
Read 2 more answers
New Orleans has an altitude at and below sea level, a latitude near the Tropic of Cancer (the equator-zone), is surrounded by wa
Softa [21]

Answer:

Rainy, sunny and humid.

Explanation:

4 0
3 years ago
Ludwig Boltzmann developed a model that relates entropy to _________.
kifflom [539]

Answer:

the number of possible configurations of the locations and energies of the atoms or molecules that comprise a system

Explanation:

Ludwig Boltzmann was the first to suggest that the concept of entropy could be calculated by examining the positions and energies of molecules. This was developed into an equation, known as the Boltzmann equation, which relates entropy to the number of microstates (W):

S = k ln W

where k is the Boltzmann constant (1.38 x 10-23 J/K), and W is the number of microstates.

Microstates was used to imply the number of different possible arrangements of molecular position and kinetic energy at a particular thermodynamic state. Therefore any process that gives an increase in the number of microstates therefore increases the entropy. Hence the answer.

5 0
4 years ago
The following table shows the symptoms in four patients. Each patient suffers from a different disease.
RideAnS [48]

Answer:

D.  Food poisoning, Bacteria Vomiting, loose stools

6 0
3 years ago
Read 2 more answers
Oh really<br> How do I look evil, right? Egypt made me brown
olasank [31]

Answer:

ummmmmmmmmmmmmmmmmmmmmmmm

8 0
3 years ago
Read 2 more answers
Other questions:
  • use the periodic table to select the element from the drop-down menu that has the correct relative electronegativity.
    11·2 answers
  • An atom of magnesium has an atomic number of 12 and a mass number of 24. how many neutrons are in the neclues
    10·2 answers
  • An accepted and university true explanation of observed facts is a what ? A) law B) hypothesis C) theory D) guess
    10·2 answers
  • What is density? what does it tell you about substance?
    10·1 answer
  • Which of these is true concerning an endothermic reaction? *
    10·1 answer
  • What is the mass of 14.10 moles of Li2O?
    10·1 answer
  • Identify the properties of a covalent substance (multiple answers )
    11·2 answers
  • ⚠️Which type of energy warms earths surface⚠️ ASAP needed 10points
    13·2 answers
  • Please answer
    13·1 answer
  • The empirical rule states that, for data having a bell-shaped distribution, the portion of data values being within one standard
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!