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
Natalija [7]
3 years ago
8

How is enthalpy used to predict whether a reaction is endothermic or exothermic? when the enthalpy of the reactants is higher th

an the enthalpy of the products, the reaction is endothermic. when the enthalpy of the products is higher than the enthalpy of the reactants, the reaction is exothermic. when the enthalpy change of the reaction is positive, the reaction is exothermic. when the enthalpy change of the reaction is positive, the reaction is endothermic.
Chemistry
2 answers:
mafiozo [28]3 years ago
8 0
When the enthalpy change of the reaction is positive the reaction is endothermic
this means that the reaction is absorbing energy from the surrounding to the vessel
AleksAgata [21]3 years ago
4 0

The correct option is this: WHEN THE ENTHALPY CHANGE OF THE REACTION IS POSITIVE, THE REACTION IS ENDOTHERMIC.

A chemical reaction can be an exothermic reaction or an endothermic reaction based on whether it absorb or give out energy when it is occurring. An exothermic reaction is a type of reaction that gives out energy when it is occurring. The enthalpy change of exothermic reactions is always negative. An endothermic reaction is a type of chemical reaction in which energy is absorbed from the environment. The enthalpy change of endothermic reaction is always positive.

You might be interested in
Which of the following is a statement of Hess's law?
attashe74 [19]

Answer:

C

Explanation:

the enthalpy of reaction is independent of the reaction path

7 0
3 years ago
In TEN complete sentences, describe how the LAW OF CONSERVATION applies to the stuff YOU OWN. For example: In real life, can new
satela [25.4K]

Answer:

Both the initial and final substances are composed of atoms because all matter is composed of atoms. According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and type of atoms after the chemical change as were present before the chemical change.

Explanation:

The atoms that make up your body were produced inside a star and have ... I read once that atoms get recycled so much through the planet that each of ... from William Shakespeare, but I do know this: All of us come from stars. ... If you have gold fillings in your teeth, those atoms came from a star explosion.

6 0
3 years ago
21. Apply Concepts Classify each reaction and balance the
adell [148]

The reactions are in order which includes combustion reaction, Hydration reaction, oxidation reaction, and displacement reaction.

a) A combustion reaction is a chemical reaction between a fuel and an oxidant where heat is released. The combustion reaction example is given below. It is a balanced chemical reaction.

2C₃H₆(g) + 9O₂(g) --------> 6CO₂(g) + 6H₂O(g)

b. A hydration reaction is a chemical reaction in which a molecule of water is added to another molecule. Here Aluminum oxide is added to water to form aluminum hydroxide.

4Al₂O3(s) + 6H₂O(l)------> 2Al(OH)3(s)

c. When a metal reacts with oxygen, the metal forms an oxide. Oxide is a compound of metal and oxygen. Here lithium metal reacts with oxygen to form lithium oxide.

2Li(s) + O₂(g)-----> Li₂O(s)

d. A displacement reaction is one in which a more reactive element displaces a less reactive element from a compound. Here Zinc is more reactive than silver, so silver was displaced to form Zinc Nitrate.

Zn(s) + 2AgNO₃(aq) -----> 2Ag(s) + Zn(NO₃)₂(aq)

To know more about reactions, click below:

brainly.com/question/11231920

         

#SPJ1

4 0
1 year ago
NO2+H4➡2 H2O+N What are the elements
Firdavs [7]
They are nitrogen, oxygen, hydrogen
6 0
3 years ago
Read 2 more answers
Round the following numbers to the number of significant figures indicated:
Kruka [31]
  1. 3.5
  2. 9
  3. 24.7
  4. 8.01
  5. 0.006
  6. 13(1.25×1012=12.65)

Explanation:

Above we have simply looked the condition that where we put decimal point that gives your needed answer after round off.

For example:

we have to make 2 s.f from 345 so we kept decimal after 3 and we rounded off to make 3.5 from 3.45

Hope you got it

7 0
3 years ago
Other questions:
  • Describe the motion of a pendulum in terms of kinetic and potential energy. As the pendulum moves from its greatest to lowest he
    6·1 answer
  • Is the mass of the reactants always equal to the mass of the products in a chemical reaction?
    8·1 answer
  • An element's atomic number is 86. how many protons would an atom of this element have?
    15·1 answer
  • What are the two types of pure substances? Give definitions for each.
    6·2 answers
  • Write the balanced reaction using the fewest whole number coefficients to describe the reaction between gaseous hydrogen and gas
    6·1 answer
  • Which of the following compounds would you expect to be the most reactive?
    7·1 answer
  • Consider the following equilibrium:
    10·1 answer
  • If 4.00 moles of O2 occupies a volume of 5.0 L at a particular temperature and pressure, what volume will 3.00 moles of oxygen g
    15·1 answer
  • What makes an element the same as another element
    6·1 answer
  • The cost of 1kg of potatoes is $8. What is the cost of 15 kg of potatoes? (hurry pls)
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!