Bilal asked in Science & MathematicsPhysics · 2 months ago

An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same amount of 0°C water. ?

The specific heat capacity of water is 1.00 kcal/(kg · °C), and its latent heat of fusion is 79.8 kcal/kg.

(a) How much heat in kcal is required to raise the temperature of 0.510 kg of water from 0°C to 26.0°C?

(b) How much heat is required to first melt 0.510 kg of 0°C ice and then raise its temperature to 26.0°C?

 

3 Answers

Relevance
  • NCS
    Lv 7
    2 months ago
    Favorite Answer

    (a) Q = mcΔT

    Q = 0.510kg * 1.00kcal/kg·ºC * 26.0º = 13.3 kcal

    (b) Q' = mL + mcΔT

    Q' = 0.510kg*79.8kcal/kg + 13.3kcal = 54.0 kcal

  • 2 months ago

    An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same amount of 0°C water. The specific heat capacity of water is 1.00 kcal/(kg · °C), and its latent heat of fusion is 79.8 kcal/kg.

    (a) How much heat in kcal is required to raise the temperature of 0.390 kg of water from 0°C to 26.0°C?

    in kcal

    (b) How much heat is required to first melt 0.510 kg of 0°C ice and then raise its temperature to 26.0°C?

    in kcal

    a) Q= mc(T0-Tf)

    Q=0,51Kg*1.00 kcal/(kg · °C)* (26 C- 0 C)

    Q= 13,26 kcal

    b) Q= mL + mc(T0-Tf)

    Q=0,51Kg*79.8 kcal/kg + 0,51Kg*1.00 kcal/(kg · °C)* (0 C- 26 C)

    Q= 55,29 kcal -13,26 kcal= 40,698 kcal

  • 2 months ago

    are we assuming pressure does not matter?

Still have questions? Get your answers by asking now.