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Boiling Point क्वथनांक

Boiling Point
The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere (760 torr).The boiling point of a liquid varies depending upon the surrounding environmental pressure. A liquid in a partial vacuum has a lower boiling point than when that liquid is at atmospheric pressure. A liquid at high pressure has a higher boiling point than when that liquid is at atmospheric pressure. For a given pressure, different liquids boil at different temperatures.

क्वथनांक
 किसी तरल पदार्थ का क्वथनांक वह तापमान होता है जिस पर उसका वाष्प दाब उसके ऊपर की गैस के दबाव के बराबर होता है। एक तरल का सामान्य क्वथनांक वह तापमान होता है जिस पर उसका वाष्प दाब एक वायुमंडल (760 torr) के बराबर होता है।  तरल का क्वथनांक आसपास के पर्यावरणीय दबाव के आधार पर भिन्न होता है।  एक आंशिक वैक्यूम में एक तरल पदार्थ की तुलना में कम उबलते बिंदु होता है जब तरल वायुमंडलीय दबाव पर होता है।  उच्च दाब पर एक तरल पदार्थ की तुलना में एक उच्च क्वथनांक होता है जब वह तरल वायुमंडलीय दबाव पर होता है।  किसी दिए गए दबाव के लिए, अलग-अलग तरल पदार्थ अलग-अलग तापमान पर उबालते हैं।

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