Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium $($minimum$)$ are needed to absorb $8\mathrm{.}90MJ$ of energy in the form of heat if the temperature of the sodium is not to increase by more than $10\mathrm{.}0C?$ Use $C_P=30\mathrm{.}8\frac{J}{K*mol}$ for $Na(l)$ at $500K.$