Respuesta :

nkirotedoreen46

Answer:

12,281.6 Joules

Explanation:

  • The amount of heat energy is calculated by multiplying the mass of a substance by its specific heat capacity and then by the change in temperature.
  • That is, Q = m × c ×Δt

In our case;

Mass of water vapor, m = 190.0 g

Change in temperature, Δt = 150°C - 118°C = 32°C

Taking the specific heat capacity of water vapor = 2.02 J/g°C

Therefore;

Amount of heat = 190.0 g × 2.02 J/g°C × 32°C

                          = 12,281.6 Joules

Hence, the amount of heat needed is 12,281.6 Joules

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