چهارشنبه 14 بهمن 1394 06:04 ب.ظ
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یکی از دوستان کامنت گذاشته بودند و تفاوت بخار و گاز رو پرسیده بودند .
متأسفانه از این دو واژه ای که گفتید یعنی گاز (Gas) و بخار (Vapour) در فارسی بعنوان واژه های هم معنی استفاده میشه. بهرحال گاز از مولکول های مجزا و منفرد تشکیل شده. اما بخار نوعی آئروسل بشمار میره؛ یعنی مخلوط مایع در گاز. برای مثال بخار آب با فاز گازی آب بسیار تفاوت داره. فاز گازی آب هیچ رنگ مشخصی نداره و کاملاً شفاف و نامرئیه (مانند رطوبت طبیعی موجود در هوا) اما بخار آب از ذرات بسیار ریز آب معلق در هوا تشکیل شده که نور رو میشکنن و منعکس میکنن و بنابراین بصورت توده ای سفید رنگ دیده میشه.
آزمایشش هم مجانیه. فقط کافیه دستت رو یکبار بفاصله حدود یک وجبی نوک کتری آب جوش و داخل بخار سفید رنگی که از اون بیرون میاد بگیری و دفعه بعد دستتو ببری پایین تر و دقیقاً به فاصله ی یکی دو سانتی متری نوک کتری جایی که بخار کاملاً بی رنگه قرار بدی. مطمئن باش که تا مدت ها یادت میمونه که فرقشون چیه! (البته جهت فهم مطلب گفتم یه وقت نری اینکارو بکنی، گرمای نهان میعان آب بدجور میسوزونه)
آزمایشش هم مجانیه. فقط کافیه دستت رو یکبار بفاصله حدود یک وجبی نوک کتری آب جوش و داخل بخار سفید رنگی که از اون بیرون میاد بگیری و دفعه بعد دستتو ببری پایین تر و دقیقاً به فاصله ی یکی دو سانتی متری نوک کتری جایی که بخار کاملاً بی رنگه قرار بدی. مطمئن باش که تا مدت ها یادت میمونه که فرقشون چیه! (البته جهت فهم مطلب گفتم یه وقت نری اینکارو بکنی، گرمای نهان میعان آب بدجور میسوزونه)
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