Answer to Question #184753 in Molecular Physics | Thermodynamics for Tobias Amukwiita

Question

How much heat is required to change 200ml of ice at - 22°C into steam 100 °C

Answer 1

$\lambda=3.4\cdot 10^5~\frac{J}{kg},\\ c_i=2.1\cdot 10^3~\frac{J}{kg\cdot °C},\\ c_w=4.2\cdot 10^3~\frac{J}{kg\cdot °C},\\ L=2.26\cdot 10^6~\frac{J}{kg},$

$\Delta t_1=0-(-22)=22°C,\\ \Delta t_2=100-0=100°C,$

$m=\rho V.$

$Q=Q_1+Q_2+Q_3+Q_4=\rho V(\lambda+c_i \Delta t_1+c_w \Delta t_2+L),$

$Q=613~kJ.$