Science, asked by nishakumari99330, 9 months ago

what do you mean by exothermic reaction

Answers

Answered by Anonymous

Answer:

An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.

hope it's help u ✌️✌️

Explanation:

$</p><p></p><p><!DOCTYPE html> <html lang="en"> <head> <title>Shinchan</title> </head> <body> <div class="face"> <div class="forhead"></div> <div class="cheeks"></div> <div class="ear"></div> <div class="eyebrow left"></div> <div class="eyebrow right"></div> <div class="eye left"></div> <div class="eye right"></div> <div class="mouth"></div> <div class="shy"></div> <div class="shy right"></div> </div> <style> body { background:#00FFFF } .face { height: 600px; width: 350px; position: relative; margin: auto; } .face:before { content:''; background:black; height:122px; width:95px; position:absolute; z-index:6; left:210px; top:29px; border-radius:100% 190% 100% 0%; transform: rotate(-20deg); } .face:after { content:''; width:230px; height:180px; background:black; content:''; transform: rotate(-8deg); position:absolute; border-radius:100% 160% 100% 0%; left:70px; bottom:-14px; top:10px; z-index:5; } .forhead, .forhead:after { content: ''; width: 220px; height: 181px; background: #fbc6a3; content: ''; transform: rotate(-3deg); position: absolute; border-radius: 60% 120% 50% 0%; left: 67px; bottom: -14px; top: 21px; z-index: 6; } .forhead:after { width: 160px; height: 150px; border-radius: 150% 174% 159% 100%; transform: rotate(-20deg); top: 13px; left: 59px; border-top: 15px solid #fbc6a3; } .forhead:before{ background:#fbc6a3; width:60px; height:10px; content:''; position:absolute; z-index:7; left:105px; top:9px; transform: rotate(13deg); border-radius:100% } .ear { width:60px; height:50px; background:#fbc6a3; z-index:7; position:absolute; border-radius:300% 190% 200% 100%; transform: rotate(-20deg); top:110px; left:285px } .cheeks { background: #fbc6a3; width: 280px; height: 100px; border-radius: 50px 0px 50px 40px; transform: rotate(-3deg); position: relative; content: 'a'; top: 108px; left:10px } .cheeks:after { width: 297px; height: 100px; background: #fbc6a3; content: ''; transform: rotate(-3deg); position: absolute; border-radius: 100% 100% 100% 100%; left: 1px; bottom: -14px; } .eye { width:40px; height:40px; position:relative; background:black; border-radius:100%; animation: close-eye 4s none .2s infinite; } .eye:after { content:''; position:absolute; background:white; width:15px; height:15px; border-radius:100%; left:17px; top:12px; } .eye:before { content:''; position:absolute; width:70px; height:60px; border-radius:100%; border-top:2px solid black; left:-20px; margin-top:-20px; } .eye.left,.eye.right { position:absolute; top:80px; left:100px; z-index:10; } .eye.right { left:190px; top:90px; } .eyebrow { animation: eyebroani 2s linear .2s infinite; } .eyebrow,.eyebrow:after { position:absolute; width:20px; height:60px; background:black; z-index:8; border-radius:15px; transform: rotate(40deg); top:10px; left:90px; } .eyebrow:after { content:''; transform: rotate(-100deg); left:19px; margin-top:-23px; top:auto; } .eyebrow.right { left:180px; top:8px; transform: rotate(50deg); } .mouth { position:absolute; width:40px; height:40px; background:#76322f; border-radius:100%; top:180px; left:50px; z-index:8; } .shy { position:absolute; width:0px; height:0px; border-radius:100%; opacity:0; box-shadow: 0px 0px 40px 20px red; z-index:8; left:35px; top:160px; animation: shy 10s linear .2s infinite; } .shy.right { left:170px; top:180px; } @keyframes eyebroani { 0% {margin-top:auto} 10% {margin-top:-10px} 20% {margin-top:auto} 30% {margin-top:-10px} 40% {margin-top:auto} 100% {margin-top:auto} } @keyframes shy { 0% {opacity:0} 10% {opacity:0.2} 90% {opacity:0.2} 100% {opacity:0} } @keyframes close-eye { 0% { height: 40px; margin-top: auto; overflow: auto; } 5% { height: 2px; margin-top: 20px; overflow: hidden; } 5.1% { height: 40px; margin-top:0; overflow:visible; } } </style> </body> </html></p><p></p><p></p><p>$

Answered by prince2220karan

Explanation:

An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative."Exothermic reactionsusually release heat and entail the replacement of weak bonds with stronger ones.

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what do you mean by exothermic reaction​

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An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative."Exothermic reactionsusually release heat and entail the replacement of weak bonds with stronger ones.

what do you mean by exothermic reaction