in the figure. The block is oriented in such a way that two of its long surfaces are 7.18 A block of ice has the shape of a parallelepiped with the dimensions indicated horizontal. It is surrounded by 20°C air from all sides. Calculate the total heat transfer rate between the ambient air and the ice block q (W), by estimating the heat transfer through each face. Calculate also the ice melting rate that corresponds to the total heat transfer rate. The ice latent heat of melting is h=333.4 kJ/kg. Air, 20°C 0.3 m 0.3 m + Figure P7.18 Im Ice, 0°C