4.23. How much will the melting temperature of platinum decrease compared to the reference (1769.3 ° C), if after dispersion the average particle size is 2 * 10–9 m? Take a surface tension of 2.3 J / m2 and a heat of fusion of 111 kJ / kg.
If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.