What does one mean by exothermic and endothermic reactions? Give examples.

-

Ques 9: What does one mean by exothermic and endothermic reactions? Give examples.  

Ans 9: Chemical reactions that release energy in the form of heat, light, or sound are called  exothermic reactions. Example: Mixture of sodium and chlorine to yield table salt. 

              2 Na + Cl2 →2 Na Cl

In other words, combination reactions are exothermic. 

Reactions that require energy or absorb   energy in order to proceed are called endothermic reactions. 

For example: In the process of photosynthesis, plants use the energy from the sun to convert carbon dioxide and water to glucose and oxygen.

      6 CO2 + 6 H2O → C6H12O6 + 6 O2



««Previous question            Next question»»

Comments

  1. subsgemonsbi-Syracuse27 May 2022 at 10:38

    subsgemonsbi-Syracuse Michael Olowolayemo click
    rexrapore

    ReplyDelete
  2. crepefOlincpu25 September 2022 at 08:18

    ArisdiuXtracpi Angie Moore Adobe Creative Cloud
    Affinity Designer
    Tekla Structures 2022 SP4
    Avid Pro Tools
    robapuncmitt

    ReplyDelete
  3. Anonymous12 September 2025 at 18:03

    Its been a enthusiastic pleasure to visit this web page and other web pages on this blog page.

    ReplyDelete

Post a Comment

Popular posts from this blog

Test and Measurement in Sports Case Study Based Questions Chapter 6 Class 12 Physical education

-
 1. Mr. Lakshman, aged 65 years worked as a civil engineer in a construction company. He had to walk and climb a lot as part of his job. After retirement, he settled with his son spending time with his grandchildren. Now a days he is experiencing difficulty in doing certain chores which involves physical movement.  (i) Which of the following tests would you recommend to check Mr. Lakshman’s fitness? (a) Harvard step test  (b) Rikli & Jones test (c) AAHPER test (d) Rock port test (ii) How many series of tests are there in the prescribed fitness test for Mr. Lakshman? (a) 8  (b) 6 (c) 5  (d) 4 (iii) Chair sit & reach test is done to check ____________ (a) Agility (b) Speed (c) Flexibility (d) Strength (iv) Pick the odd one out. (a) Arm curl test (b) Chair stand test (c) 6 min walk test (d) Partial curl up (v) The 8 foot up &go test, as shown in the picture is performed to assess _________ (a) Agility (b) Endurance (c) Speed (d) Strength 2. (i) Both the...
Read more

2.0 gram of a metal burst in oxygen give 3.2 gram of its oxide. 1.42 gram of the same metal heat in steam give 2.27 gram of its oxide which toys shown by this data?

-
Ques : 2.0 gram of a metal burst in oxygen give 3.2 gram of its oxide. 1.42 gram of the same metal heat in steam give 2.27 gram of its oxide which toys shown by this data?  Ans : In the first compound, 3.2 gram of metal oxide contained 2.0 gram of metal 100 gram of metal oxide contained metal =2.0/3.2 × 100= 62.5 g :· % metal in first compound= 62.5% In the second compound, 2.27 gram of metal oxide contains metal = 1.42 gram 100 gram of metal oxide contains the metal= 1.42/2.27×100=62.55 gram :· % metal in first compound= 62.55% Thus, the percentage of metal in metal oxide obtained from to experiment is nearly same. Hence, the above data illustrate the law of constant composition.  <<   Previous                                                       Next   >>
Read more

Brain (Study - Encephology) || Brain Encephology || BRAIN IS DIVIDED INTO THREE PARTS WITH THE SUB DIVISIONS||

-
                                Brain                 (Study - Encephology ) # Brain is the highly specalised organ of the body. Brain develops by the enlargement of embryonic neural tube... It is presemt in the cranial cavity of the skull and forms about 98% of the central nervous system.. # Brain is protected by connective tissue membrane called MENINGES.. # In fishes, only one protective covering is present called MENINX PRIMITIVA.. # In amphibians, reptiles, birds, brain is covered by two meninges:  Inner- pia arachnoid and Outer - Duramater.. # In mammals three protective covering is present:  Inner - piamater ; Middle - arachnoid and Outer - durameter...   # Just below and above the arachnoid membrane space is present, called SUBARACHNOID and SUBDURAL respectively..  These space are filled with Cerebrospinal fluid protect the brain from...
Read more

Should Wizard Hit Mommy? Summary Class 12th English || Theme || Characters || Gist of the story Vistas class 12 English

-
Should Wizard Hit Mommy? Summary   John Hoyer Updike (March 18, 1932 – January 27, 2009) was an American novelist, poet, short-story writer, art critic, and literary critic. One of only three writers to win the Pulitzer Prize for Fiction more than once. Updike published more than twenty novels, more than a dozen short-story collections, as well as poetry, art and literary criticism and children’s books during his career. Introduction Little children love to hear stories from their parents at bedtime. Such stories are mostly fables and have no logic behind them. Many a time, parents make up stories out of their own head. Little children take them as literally true. But as the child grows up, he becomes inquisitive. He begins to ask many questions. He wants to know why and how certain things happen. He wants to know the reason behind things. Sometimes parents take this questioning of the child as an affront. They try to discourage it. They want the child to accept as true whatever is...
Read more