heat of neutralization

中和熱

WordNet

1. provide with heat; "heat the house"
2. a form of energy that is transferred by a difference in temperature (同)heat energy
3. make hot or hotter; "the sun heats the oceans"; "heat the water on the stove" (同)heat_up
4. gain heat or get hot; "The room heated up quickly" (同)hot up, heat_up
5. the trait of being intensely emotional (同)warmth, passion
6. the sensation caused by heat energy (同)warmth
7. a preliminary race in which the winner advances to a more important race
8. a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water (同)neutralisation, neutralization_reaction, neutralisation reaction
9. (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation) (同)neutralisation
10. action intended to keep a country politically neutral or exclude it from a possible war; "the neutralization of Belgium" (同)neutralisation
11. action intended to nullify the effects of some previous action (同)neutralisation, counteraction
12. the 5th letter of the Hebrew alphabet
13. marked by emotional heat; vehement; "a heated argument"
14. made warm or hot (`het is a dialectal variant of `heated' (同)heated up, het, het_up

PrepTutorEJDIC

1. 〈U〉『熱さ』,『暑さ』,熱い状態 / 〈U〉熱度,温度 / 〈U〉(家などの)暖房装置 / 〈U〉熱心,熱烈;(物事の)最高潮《+『of』+『名』》 / 〈U〉(エネルギーとしての)熱 / 〈C〉(競技の)1回,1ラウンド / …‘を'『熱する』,暖める《+『up』+『名,』+『名』+『up』》 / …‘を'興奮させる,怒らせる《+『up』+『名,』+『名』+『up』》 / 熱くなる,暖まる《+『up』》
2. （雌の）発情（in heatとして使う）・金・銭・緊迫、プレッシャー、批判、批評、警察の追跡
3. 《所有・所属》…『の』,…のものである,…に属する・《材料・要素》…『でできた』,から成る・《部分》…『の』[『中の』] ・《数量・単位・種類を表す名詞に付いて》…の・《原因・動機》…『で』,のために(because of) ・《主格関係》…『の』,による,によって・《目的格関係》…『を』,の・《同格関係》…『という』・《関係・関連》…『についての』[『の』],の点で・《抽象名詞などと共に》…の[性質をもつ] ・《『It is』+『形』+『of』+『名』+『to』 doの形で,ofの後の名詞を意味上の主語として》・《分離》…『から』・《起原・出所》…『から』[『の』](out of) ・《『名』+『of』+『a』(『an』)+『名』の形で》…のような・《『名』+『of』+『mine』(『yours, his』など独立所有格)の形で》…の…・《時》(1)《副詞句を作って》…に《形容詞句を作って》…の・《時刻》《米》…前(to,《米》before)
4. 彼は,彼が / 《指す人の性別が分からないか,または分かる必要のない場合に》その人,あの人,自分 / 《he who(that)の形で》《文》…するものはだれでも / (動物の)おす(雄)
5. 鬼ごっこ(tag,tick,tig)
6. 熱せられた / 興奮した,怒った

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/07/31 17:25:51」(JST)

wiki en

[Wiki en表示]

The enthalpy of neutralization (ΔH_n) is the change in enthalpy that occurs when one equivalent of an acid and one equivalent of a base undergo a neutralization reaction to form water and a salt. It is a special case of the enthalpy of reaction. It is defined as the energy released with the formation of 1 mole of water.

When a reaction is carried out under standard conditions at the temperature of 298 K (25 degrees Celsius) and 1 atm of pressure and one mole of water is formed it is called the standard enthalpy of neutralization (ΔH_n^o).

The heat (Q) released during a reaction is

$Q=mc_{p}\Delta T$

where m is the mass of the solution, c_p is the specific heat capacity of the solution, and ∆T is the temperature change observed during the reaction. From this, the standard enthalpy change (∆H) is obtained by division with the amount of substance (in moles) involved.

$\Delta H=-{\frac {Q}{n}}$

When a strong acid, HA reacts with a strong base, B(OH), the reaction that occurs is

${\ce {{H+}+OH^{-}->H2O}}$

as the acid and the base are fully dissociated and neither the cation B⁺ nor the anion A⁻ are involved in the neutralization reaction. The enthalpy change for this reaction is -57.62 kJ/mol at 25C.

For weak acids or bases, the heat of neutralization is pH dependent. In the absence of any added mineral acid or alkali some heat is required for complete dissociation. The total heat evolved during neutralization will be smaller.

e.g. ${\ce {{HCN}+{NaOH}->{NaCN}+{H2O};\ \Delta H=-12kJ/mol}}$ at 25C

The heat of this reaction is equal to (–12 + 57.3) = 45.3 kJ/mol at 25C.

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• 熱工学コンファレンス講演論文集 2013, 165-166, 2013-10-18
• NAID 110009955674

Related Links

• Heat Of Neutralization | Definition of Heat Of Neutralization by ...

: the heat of reaction resulting from the neutralization of an acid or base especially: the quantity produced when a gram equivalent of a base or acid is ... Comments on heat of neutralization What made you want to look ...

• What is the enthalpy of neutralization? - A Plus Topper

What is the enthalpy (heat) of neutralization? Neutralisation is the reaction between an acid and a base to form a salt and water. Some examples of neutralisation reaction are as follows. During neutralisation reaction, hydrogen ions ...

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★リンクテーブル★

リンク元	「中和熱」
関連記事	「heat」「neutralization」「heating」

「中和熱」

　　[★]

英

heat of neutralization

「heat」

　　[★]

• n.

• 熱、(生物)発情、発情期

• v.

• 加熱する、加温する

関

estrous、estrus、heating、hot、rewarming

　 　 　 　 　 　 　 　 　

「neutralization」

　　[★]

• n.

• 中和反応、中和。中性化、中立化

　 　 　 　

「heating」

　　[★]

• n.

• 加温

関

heat、rewarming