Question

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Answer 1

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½â´ð ½â£º¹Ü¿ª¿ÚÏòÉÏʱ£¬·â±ÕÆøÌåµÄѹǿ${p}_{1}^{\;}={p}_{0}^{\;}+h=75+10=85cmHg$            Ìå»ý${V}_{1}^{\;}=LS=30S$                  ζÈ${T}_{1}^{\;}=273+{t}_{1}^{\;}=273+27=300K$
Ö±²£Á§¹Ü»ºÂýתµ½Ë®Æ½Î»ÖÃʱ£ºÑ¹Ç¿${p}_{2}^{\;}={p}_{0}^{\;}=75cmHg$             Ìå»ý${V}_{2}^{\;}={L}_{2}^{\;}S$
¸ù¾Ý²£Òâ¶ú¶¨ÂÉ£¬ÓУº${p}_{1}^{\;}{V}_{1}^{\;}={p}_{2}^{\;}{V}_{2}^{\;}$
´úÈëÊý¾Ý£º$85¡Á30S=75¡Á{L}_{2}^{\;}S$
½âµÃ£º${L}_{2}^{\;}=34cm$
${L}_{2}^{\;}+h£¾{L}_{0}^{\;}$£¬ËùÒÔÓÐË®ÒøÒç³ö£¬Ê£ÓàË®ÒøÖùµÄ³¤¶È$h¡ä={L}_{0}^{\;}-{L}_{2}^{\;}=42-34=8cm$
»ºÂýÄæʱÕëתµ½Ô­Î»Öã¬${p}_{3}^{\;}={p}_{0}^{\;}+h¡ä=75+8=83cmHg$                           Ìå»ý${V}_{3}^{\;}={L}_{3}^{\;}S$                           ζÈ${T}_{3}^{\;}=273+{t}_{2}^{\;}=270K$
¸ù¾ÝÀíÏëÆøÌå״̬·½³Ì£º$\frac{{p}_{1}^{\;}{V}_{1}^{\;}}{{T}_{1}^{\;}}=\frac{{p}_{3}^{\;}{V}_{3}^{\;}}{{T}_{3}^{\;}}$
´úÈëÊý¾Ý£º$\frac{85¡Á30S}{300K}=\frac{83¡Á{L}_{3}^{\;}S}{270K}$
½âµÃ£º${L}_{3}^{\;}=27.65cm$
´ð£º×îÖÕÆøÖùµÄ³¤¶ÈΪ27.65cm

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