Estimate the thermal diffusivity of butter at 20°C. * Density of butter= 911kg/m3 * Specific Heat  = 2.04 kJ/Kg degree celsius  * Thermal conductivity (k)= 0.2 W/m K

Suppose that the amount of heat removed when 15.6 kg of water freezes at 0.0 °C were removed from ethyl alcohol at its freezing/melting point of −114.4 °C. How many kilograms of ethyl alcohol would freeze?

Arrange the following in order of increasing solubility in water: C2H5OH; CO2; N2O.

The vapor of liquid bismuth is 400 mm Hg at 1.72x10^3 K. Assuming that it’s molar heat of vaporization is constant at 184 kj/mol, the vapor pressure of liquid Bi is ____ mm Hg at a temperature of 1.70x10^3. The normal boiling point of liquid ethane thiol is 308 K. Assuming that its molar heat of vaporization is constant at 26.7 kj/mol, the boiling pint of C2H5SH when the external pressure is 0.753 atm is ____ K.