This problem explores emissions during heating of hexane(1) and toluene(2) in a tank with a fixed roof that is vented to the atmosphere through an open pipe in the roof. Atmospheric pressure is 760 mmHg. The tank volume is 2000 L, but the maximum operating liquid level is 1800 L. Determine the emissions of each VOC (in g) when the tank is heated.

(a) The liquid volume is 1800 L, x₁ = 0.5, Tⁱ = 10°C, AT = 15°C. 

(b) The liquid volume is 1800 L, x₁ = 0.5, Tⁱ = 25°C, AT = 15°C. 

(c) The liquid volume is 1500 L, x₁ = 0.5, Tⁱ =25°C, AT = 15°C. 

(d) The liquid volume is 1800 L, x₁ = 1.0, Tⁱ = 25°C, AT = 15°C. 

(e) Explain why the ratio [(emission of toluene in part (b))/(emission of toluene in part (a))] is different from the corresponding ratio of hexane emissions.