Question

Calculate the amount of heat released when 27.0 g H2O is cooled from a liquid at 314 K to a solid at 263 K. The melting point of H2O is 273 K. Given specific heat capacities and enthalpy of fusion, determine the moles of H2O in the sample.

Answer 1

To calculate the amount of heat released when cooling water from liquid to solid, you need to consider the heat absorbed during the cooling and the heat released during the phase change from liquid to solid. The equation q = mCΔT + nΔH can be used, where q is the heat transferred, m is the mass of the substance, C is the specific heat capacity, ΔT is the change in temperature, n is the number of moles of the substance, and ΔH is the enthalpy change.

Step-by-step explanation:

To calculate the amount of heat released when 27.0 g of H2O is cooled from a liquid at 314 K to a solid at 263 K, we need to consider the heat absorbed during the cooling and the heat released during the phase change from liquid to solid. We can use the equation:

q = mCΔT + nΔH

Where:

1. q is the heat transferred
2. m is the mass of the substance
3. C is the specific heat capacity
4. ΔT is the change in temperature
5. n is the number of moles of the substance
6. ΔH is the enthalpy change