Object A, with heat capacity CA and initially at temperature TA, is placed in thermal contact with object B, with heat capacity CB and initi

Question

Object A, with heat capacity CA and initially at temperature TA, is placed in thermal contact with object B, with heat capacity CB and initially at temperature TB. The combination is thermally isolated. If the heat capacities are independent of the temperature and no phase changes occur, the final temperature of both objects is

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Bình An 4 years 2021-08-10T08:56:33+00:00 1 Answers 287 views 0

Answers ( )

  1. linhdan
    0
    2021-08-10T08:58:18+00:00
    Reply

    Answer:

    d) (CATA + CBTB) / (CA + CB)

    Explanation:

    According to the given situation, the final temperature of both objects is shown below:-

    We assume T be the final temperature

    while m be the mass

    So it will be represent

    m CA (TA – T) = m CB (T – TB)

    or we can say that

    CATA – CA T = CB T – CBTB

    or

    (CA + CB) T = CATA + CBTB

    or

    T = (CA TA + CBTB) ÷ (CA + CB)

    Therefore the right answer is d

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