1. A car’s engine block is made of (a) Iron, (b) Copper, (c) Tungsten and has a mass of 210 kg. How much heat is absorbed by the engin

Question

1. A car’s engine block is made of (a) Iron, (b) Copper, (c) Tungsten and has a mass of 210 kg.
How much heat is absorbed by the engine when its temperature is raised from
(a) 10° C to 91°C? (b) 13° C to 97° C? (c) 14° C to 98° C?

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Gia Bảo 5 months 2021-08-16T05:03:48+00:00 1 Answers 7 views 0

Answers ( )

    0
    2021-08-16T05:04:54+00:00

    Answer:

    i) Heat required to raise temperature of iron is

    Q_{iron} = 7.55 \times 10^6 J

    ii) Heat require to raise temperature of copper is

    Q_{copper} = 6.79 \times 10^6 J

    iii) Heat require to raise temperature of tungsten is

    Q_{tung} = 2.36 \times 10^6 J

    Explanation:

    As we know that specific heat capacity of

    i) Iron is 444 J/kg C

    so heat required to raise its temperature is given as

    Q_{iron} = m s \Delta T

    Q_{iron} = 210(444)(91 - 10)

    Q_{iron} = 7.55 \times 10^6 J

    ii) Copper specific heat is 385 J/kg C

    so heat required to raise its temperature is given as

    Q_{copper} = m s \Delta T

    Q_{copper} = 210(385)(97 - 13)

    Q_{copper} = 6.79 \times 10^6 J

    iii) Tungsten specific heat capacity is given as 134 J/kg C

    Q_{tung} = m s \Delta T

    Q_{tung} = 210(134)(98 - 14)

    Q_{tung} = 2.36 \times 10^6 J

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