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17 January, 15:56

Q. 40 g of water. specific heat of water is 4.18 J/g*°C. temperature changes from 20° C to 25°C, how much heat energy (Q) moves from the water to the surroundings?

a

3,344 J

b

836 J

c

4,180 J

d

209 J

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Answers (1)
  1. 17 January, 17:20
    0
    The answer to your question is the letter b. Q = 836 J

    Explanation:

    Data

    mass of water = 40 g

    C = 4.18 J/g°C

    Temperature 1 = 20°C

    Temperature 2 = 25°C

    Q = ?

    Formula

    Q = mC (T2 - T1)

    Process

    1. - To find the value of energy moved to the surroundings, just substitute the values in the formula and simplify.

    Q = (40) (4.18) (25 - 20)

    Q = (167.2) (5)

    Q = 836 J

    2. - Conclusion

    The energy moved to the surroundings is 836 J.
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