Physics 0625 · IGCSE · Transfer of thermal energy

Transfer of thermal energy — practice question

The diagram illustrates steam being introduced into water in order to increase the water’s temperature. The specific latent heat of steam has the value $2200\ \text{J g}^{-1}$. The specific heat capacity of water is $4.2\ \text{J g}^{-1}\ ^\circ\text{C}^{-1}$. The mass of the water to be heated is $490\ \text{g}$. Which mass of steam must be added to the water to raise its temperature from $19^\circ\text{C}$ to $100^\circ\text{C}$?

  • A$19\ \text{g}$
  • B$76\ \text{g}$
  • C$80\ \text{g}$
  • D$95\ \text{g}$

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