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Dve spojené nádoby A a B sú prepojené úzkou rúrou s ventilom. V nádobe A je tlak vzduchu 500 kPa pri teplote 300 K. Ventil je najprv zatvorený. Vo vedľajšej nádobe B s rovnakým objemom je tlak 100 kPa a udržovaná teplota 400K. Po otvorení ventilu sa vyrovnajú tlaky a nádoba B je ďalej udržovaná pri vyššej teplote. Aký bude napokon tlak spojených nádobách? V ktorej nádobe bude po otvorení ventilu viac molekúl?
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