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
leonid [27]
3 years ago
10

Classify the four reactions that your group analyzed today as being either endothermic or exothermic

Chemistry
1 answer:
ArbitrLikvidat [17]3 years ago
4 0
Chemical reactions are basically divided into two major classes depending on whether the reaction lose energy or gain energy from the environment during the course of the reaction. The two classes of reaction are exothermic and endothermic reaction.
An exothermic reaction is a type of reaction in which the reaction system lose energy to the environment and thus, the energy content of the reactants is more than that of the product formed. Because of this, the enthapyl change of an exothermic reaction is always negative. 
An endothermic reaction is a type of reaction in which the reaction system absorb energy from the environment. Thus, the energy contents of the products is always higher than that of the reactants and the enthapyl change of the reaction is always positive. During the course of the reaction, the reaction container is usually cold to the touch because energy is been absorbed from the environment.
You might be interested in
What protects the plant embryo?
Pani-rosa [81]
How do seed plants protect their embryos?
Reptilian embryos are protected from desiccation by a leathery shell. Similarly, sporophytes of both gymnosperms and angiosperms protect embryos within, and they also protect male gametophytes against desiccation using .....
5 0
3 years ago
Convert 3.09 x 10~3 m = nm
Dmitriy789 [7]

3090000000nm

since there's 1m = 1000000000nm

6 0
3 years ago
What happens to the particles in a substance when<br> heat is removed from a liquid?
Minchanka [31]

Answer:When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... They contract when they lose their heat.

Explanation:Google

5 0
2 years ago
Which of the following has the LOWEST electronegativity?<br> A) As<br> B) N<br> C) BI<br> D) P
ohaa [14]
N just use a electronegativity table
4 0
3 years ago
Which is the most active nonmetallic element in group 16?
timama [110]
Oxygen

For metals, reactivity increases as we move through the elements in the period table from top to bottom, and left to right. In contrast, for nonmetals, reactivity increases as we move through the elements in the periodic table, as we move from bottom to the top, and right to left. 

Group 16 on the periodic table is also called the oxygen family or chalcogens. It includes the following elements from top to bottom: Oxygen, Sulfur, Selenium, Tellurium, and Polonium. Of these, only Oxygen, Sulfur, and Selenium are nonmetals. Since reactivity of nonmetals increases going up the periodic table, oxygen is therefore the most reactive nonmetal in the group. Shown in the figure below is the reactivity trend in the periodic table.

5 0
3 years ago
Other questions:
  • Calculate the freezing point of a 0.08500 m aqueous solution of nano3. the molal freezing-point-depression constant of water is
    11·2 answers
  • One mole of the acid HCl requires how many moles of OH- for neutralization?
    7·1 answer
  • What kind of change is sodium hydroxide dissolving in water
    12·1 answer
  • In a scientific investigation what is the name for a prediction that can be tested
    7·2 answers
  • Write the name and formula of the compound made of magnesium and fluorine
    6·1 answer
  • Question 2
    9·1 answer
  • 6. Is the following equation balanced or
    8·1 answer
  • Los metales son buenos conductores de la electricidad?
    6·1 answer
  • Hammerhead sharks have weakly-muscled gills and must be in constant motion in the ocean in order to maintain a steady flow of wa
    12·1 answer
  • As a pilot is flying in level flight at 9,500 ft, the altimeter in the instrument panel is set to a pressure of 29.48 mm of Hg.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!