• 2022-06-16
    [tex=1.357x1.214]oYeHwOzvIfFhsgwwmjm08w==[/tex] 的空气在[tex=2.143x1.071]mrYnzy2TFRKIW+QJLIWRIw==[/tex] 和 [tex=3.429x1.0]6DZA3MxljQC59CqeWoyq6Q==[/tex] 的状态下,定压加热到 [tex=2.643x1.071]gnma74rDSGXnKshyyoUHiw==[/tex], 然后绝热膨胀温度降低到 [tex=2.643x1.071]7hH1UJgCaq0n9o6BrGRm4g==[/tex], 接相定容冷却到 [tex=2.143x1.071]mrYnzy2TFRKIW+QJLIWRIw==[/tex], 最后等温压缩到初始状态。所有过程都是可逆的,假设空气 [tex=2.643x1.0]tHLXBVepwCuD1X55WpqqOw==[/tex], [tex=7.571x1.357]AOXQ7wKYtNtFasENepjWzZUnVqOOMWqq6ICV668X99A=[/tex]。试将该循环画在 [tex=1.786x1.143]EjQBf/2P9WQjYyMLD7nI0w==[/tex] 图和 [tex=1.857x1.143]gRnbcS2dOdX7sYmTVhpOxw==[/tex] 图上,并求各个过程的热量、膨胀功和技术功。
  • 解: (1) 将该循环的图 [tex=1.786x1.143]EjQBf/2P9WQjYyMLD7nI0w==[/tex] 及 [tex=1.857x1.143]gRnbcS2dOdX7sYmTVhpOxw==[/tex] 图如下:[img=253x205]17a0502cfb13aa1.png[/img][img=257x219]17a0502e0b47886.png[/img](2) 为求解循环各过程的热量、膨胀功和技术功,需先确定各状态点的有关状态参数。 各状态点的已知参数: [tex=3.643x1.286]tntvbwSBqV5UIp6PtE+Lf52LgasF/MNLq4xd8A0qUQI=[/tex] , [tex=5.071x1.214]GgxHlQVN+8aIYWCgobpscg==[/tex]; [tex=4.143x1.286]rvneE73RwxWsaI31xAS7D64AbUw2/mcn/PmrXAgOuEw=[/tex], [tex=5.071x1.214]bkBVQ5HTEKd75iJPkwdI+Q==[/tex] ; [tex=4.143x1.286]mtfR5+QUC+aLx+3NrubPdPn0pickFsx3cjxaes8bMfM=[/tex]; [tex=3.643x1.286]jVfe/lahLjRN/DnaO/rIXQBbeNL1pQfRs0Kzv3eMDkQ=[/tex]于是,各状态点的其他状态参数为[br][/br][tex=20.0x2.643]kmaFG9V6XKTqJYgEfoDp2/4sKbwICHhx0yUQ06WuBp0QbgfE36RCN/F7rrv4W33kJL8TLoDsEsqw5QwDe6hemKr/REddnI7oFCHaHFjEm1garTxviAIBXu7qmxrczGkdZiKXYo90IBZrH1UDLIRnIA==[/tex][tex=23.5x3.357]qsHz0+ZBzOfxIbD+gImWcASzSMGQA/MlPtZNCu0SH/i606uEr7a5aY/Opy4D97fkCtJOeyVeFWYj41dYt8tqXZVG0OFvakOJMGvQkqGVEfzUsJGr1uz1u4RsX0SU4/JcUsgkwf5OiU90wjdudeoVPdKfoCHXsLv8QQz5RYy/Gau4HqEC3abR4Jjgv42HCwzHQgnYqpl9jDFCo7UC81GQzpdUcj8Ew7fSR6Oo501tFrA=[/tex][tex=4.071x2.571]ERePNdRBrcMJ9lTCrD0I87J6/bOClKaXbIQkItL58gM3CAU7BDxknOASjRRxtajh[/tex][tex=16.357x2.5]pufR8BD8aGvOCKziZm2KZcwWVmcvubU5lqXMRXvvG9g4kcPAlOj3Fb8Gh+m3cZhkXNKC6gAn24ENg9lAJb2uyr/rtyumibC5bIWgHH3Hegs=[/tex][tex=5.714x1.0]Te4QzEAflAyF3hC68ZpZKQ==[/tex]则循环各过程的热量、膨胀功和技术功分别为 :1-2 定压过程:[tex=20.0x1.357]bSkzeYezdDUP7vnwLvYofmg5cJRlwYBwsG0UJ0ndccuTEB4YrCqG7ED2QUpAH9YC7+45U59UtpfR7RZlUDi0yrbTlLumzT1kdKi1NsTmPmo=[/tex][tex=6.5x1.357]vcl697WT1jcoenNJ0K4Qokblp8oGKFC65KKvtdkLvI8QkWYwOj93epWzmL/jJxvW[/tex][tex=16.571x1.357]m+rYtTN/MhvD+TA5y/vDDBVMuIjLtRE5P4fE/ywF0ks4GZxRZyAh7xfMVJkEX0pWuA6wBmQx5duU+w8iSoJSww==[/tex][tex=3.143x1.286]UdevnCQHC5w3oQsnQ1zqAQ==[/tex]2-3 可逆绝热过程:[tex=2.429x1.214]JZk96OnVUY25gMXEVi28WA==[/tex][tex=8.071x2.5]VRk3mab+Vvc55y1Hvkc/FAKD3uNuhZNBvVGTXxW4+Z+5o6Wu7xnxEOPzvTlkjzA4kb3eX7AA9f0yOn+PR+66qw==[/tex][tex=14.929x2.357]DDwbPQBXtaeKt8RMcrymfbZyuSEGn8Oxv+Ts6gnMVYpzr1dYwSqT0ul2oguN0L9er6qV/qspsLRfJWfoGcOPYg==[/tex][tex=16.357x1.357]gKnm7bo6Ae+X68SWnd+pWUWoIuV4c5o83SPqIepGTdSn5zCuPNDKxXwesxHPc3m3H/XmXgXJEdRubGq7VINJ1g==[/tex]3-4 定容过程:[tex=6.357x1.357]alhoNEnoleO1wWwoHxfKrZDzEAHDV6SW4N4fDMBmWmKA405PFKHALmB3RIv0nxjO[/tex][tex=14.5x2.357]5z80pyYc0dWby9z8QUh1sbQoTGVI7DacZzpEXaA1tvcVKEVo5MWrGJFiSCn+QFCOVEB/soRgqZKu9zxAonfa2Ib74QoT3gLcJXeJZ54Uqto=[/tex][tex=6.429x1.357]DNTH4iUrScWnLxOaXl4sBogfO/0wK8i0OPH2Njmsdw4=[/tex][tex=2.714x1.214]BrX9ifVL0zgE+7O2XGub9A==[/tex][tex=7.714x1.357]50djsm9JriOuT/CNjRICMykZn2HjYaBRzOC1+8Bo/i7bStlUSjlhUrA9jK1mRkcj[/tex][tex=21.214x1.357]/Gtm23VXLxCbHOT33BGmzC8DCu7VFtZLh2Gptk3VS7I5llpQ6GeZI9ErKx4q+AOv7Cl7SjVKV+heDDKDWDZgu8OzE730HSNeEEZAah7ZFe8=[/tex]4-1 等温过程 :[tex=11.071x2.357]auZLizgUNfitnCJSPkp73DtCxKQS9oVt+tjF0wTZ6BjYFK/At+Z0CIJm95d/DPHo/yZ8NQn7fb2IZ1JX9YOKS7EQAm0zRld2e/J+fNXhPgU=[/tex][tex=17.643x2.357]u4BrT0u1E4NeTZ4us6qGaHIEFCx+vc+ptwshPzj6rBKgbeAnXWIPoRAiOfkTM39oWj321lvyyugm2TYtFx6emg==[/tex]

    举一反三

    内容

    • 0

      求函数[tex=3.286x1.429]kdT+eIE7CHPynuN6CaN40g==[/tex](抛物线)隐函数的导数[tex=1.071x1.429]BUw1BPFU3fsJlAl/vt9M9w==[/tex]当x=2与y=4及当x=2与y=0时,[tex=0.786x1.357]Hq6bf3CacUy07X+VImUMaA==[/tex]等于什么?

    • 1

      若:(1)函数 f(x)在点[tex=3.714x1.357]7VByCIzkNySq3s2l9I6f5zccNJDeV+6SQrVr3iwjgB0=[/tex]有导数,而函数g(x)在点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]没有导数;(2)函数f(x)在点[tex=3.714x1.357]7VByCIzkNySq3s2l9I6f5zccNJDeV+6SQrVr3iwjgB0=[/tex]没有导数,而函数g(x)在点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]有导数;(3)函数f(x)在点[tex=3.714x1.357]7VByCIzkNySq3s2l9I6f5zccNJDeV+6SQrVr3iwjgB0=[/tex]没有导数及函数g(x)在点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]没有导数,则函数[tex=5.643x1.357]GmtX7Vop79exGU/rpqXUYw==[/tex]在已知点[tex=2.286x1.0]DSJKaWfJALImFxxTg/8qhA==[/tex]的可微性怎样?

    • 2

      求下列函数的导函数:(1) [tex=5.0x2.357]X/CieCDGJ7iPQ3YFWuscHxHrcIE/dPFa9tFyiJXze8A=[/tex](2)[tex=6.643x1.714]Oj74y/L+OxY81QME5JWMcl+7PZ2FGQswwvjgVhjq1Dmb6dBU0oAjZBW7eFBVjqo6[/tex]

    • 3

      设[tex=5.929x1.071]gAFI4ZzNAmjFfJAphmTsRQ==[/tex],若[tex=7.786x1.357]09fTpcwFMVcu1qrv9hyVbjaVP6Nu0Q7b0o9JCaEhfzk=[/tex],[tex=7.786x1.357]17Fg+KbtgLZdNaerla1J+g==[/tex],[tex=7.714x1.357]GzWWzGNDry0+/hdju2Gv5Q==[/tex],那么[tex=0.571x0.786]/uIIzJZ/1DPgc5sOsRpAXQ==[/tex],[tex=0.571x1.0]Tr41q2//n6lfFMLRmh8s0w==[/tex],[tex=0.5x0.786]rGd4FFr4Zsu+cuz6gxITMA==[/tex]的大小关系为 A: x<y<Z B: y<z<x C: z<x<y D: z<y<x E: 不能确定

    • 4

      把[tex=1.5x1.214]oYeHwOzvIfFhsgwwmjm08w==[/tex]的[tex=2.143x1.071]mrYnzy2TFRKIW+QJLIWRIw==[/tex]的水放到温度恒为 [tex=2.643x1.071]7hH1UJgCaq0n9o6BrGRm4g==[/tex]的炉子上加热, 最后达到[tex=2.929x1.286]aFypzFdIrEAY7/qm5GVgFTqKsyxi/tMPbo4Jv5v6kFE=[/tex]水的比热是[tex=10.5x1.429]RW1VuydZxM006HV4YYoKc75bE4dtg8Gd9ZqkNEs0tg1ZsrKhLIVH3PRifIJ8eIUNrzCIqA8iIt1pAws0u9BHKw==[/tex] 水和炉子的熵变各是多少?