Q = cmAT 33. Use the formula to show that 3000 cal are required to raise the temperature of 300 g of water from 20°C to 30

Question

Q = cmAT
33. Use the formula to show that 3000 cal are required to
raise the temperature of 300 g of water from 20°C to
30°C. For the specific heat capacity c, use 1 cal/g.°C.

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Hải Đăng 4 years 2021-08-23T07:48:49+00:00 1 Answers 42 views 0

Answers ( )

  1. ngockhue
    0
    2021-08-23T07:50:46+00:00
    Reply

    Answer: Q=3000 cal

    Explanation:

    We are given the following formula:

    Q=m. c. \Delta T   (1)

    Where:

    Q=3000 cal is the amount of heat

    m=300g  is the mass  of water

    c=1 cal/g \°C  is the specific heat of water

    \Delta T  is the variation in temperature, which in this case is  \Delta T=30\°C-20\°C=10\°C  

    Rewriting equation (1) with the known values at the right side, we will prove the result is 3000 cal:

    Q=(300g)(1 cal/g \°C)(10\°C)   (2)

    Q=3000 cal   This is the result

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