Thermodynamics 1-77 Consider the system shown in Fig. P1–77. If a change of 0.7 kPa in the pressure

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Thermodynamics 1-77
Consider the system shown in Fig. P1–77. If a change of 0.7 kPa in the pressure of air causes the brine–mercury interface in the right column to drop by 5 mm in the brine level in the right column while the pressure in the brine pipe remains constant, determine the ratio of A2 /A1.

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Clarification

This is the final formula to use 1:45

(P_A1-P_A2)/(rho_w g)=SG_Hg xDelta h_Hg - SG_br Delta h_br

Then substitute the values in 2:05 onwards into the final formula

To get the A2/A1 ratio you first need to expend the height of brine both left and right sides from the figure or use your FBD then simplify. Then sub that into the respective part of the final formula

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