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20 May, 12:37

The substances below are listed by increasing specific heat capacity value. Starting at 30 Celsius, they absorb 100 kJ of thermal energy. Which one do you expect increase in temperature the most? silver 0.239J, Aluminum 0.921 J, Lithium 3.56 J, Water 4.184 J

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  1. 20 May, 12:40
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    Silver.

    Explanation:

    To obtain the right answer to question, let us calculate the change in temperature for each substance assuming they all have the same mass as 100g.

    This is illustrated below:

    1. For Siver:

    Mass (M) = 100g

    Specific heat capacity (C) = 0.239J/g°C

    Heat (Q) = 100 kJ = 100000J

    Change in temperature (ΔT)

    Q = MCΔT

    ΔT = Q/MC

    ΔT = 100000 / (100 x 0.239)

    ΔT = 4184°C

    2. For Aluminium:

    Mass (M) = 100g

    Specific heat capacity (C) = 0.921J/g°C

    Heat (Q) = 100 kJ = 100000J

    Change in temperature (ΔT)

    Q = MCΔT

    ΔT = Q/MC

    ΔT = 100000 / (100 x 0.921)

    ΔT = 1086°C

    3. For Lithium:

    Mass (M) = 100g

    Specific heat capacity (C) = 3.56J/g°C

    Heat (Q) = 100 kJ = 100000J

    Change in temperature (ΔT)

    Q = MCΔT

    ΔT = Q/MC

    ΔT = 100000 / (100 x 3.56)

    ΔT = 281°C

    4. For water:

    Mass (M) = 100g

    Specific heat capacity (C) = 4.184J/g°C

    Heat (Q) = 100 kJ = 100000J

    Change in temperature (ΔT)

    Q = MCΔT

    ΔT = Q/MC

    ΔT = 100000 / (100 x 4.184)

    ΔT = 239°C

    Summary

    Temperature change of each substance is given below

    1. Silver = > 4184°C

    2. Aluminum = > 1086°C

    3. Lithium = > 281°C

    4. Water = > 239°C

    From the calculations made above, Silver has the highest rise in temperature.
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