Avapor mixture of n-butane (b) and n-hexane (h) contains 50.0 mole% butane at 120 °c and 1 atm. a stream of this mixture flowing at a rate of 150.0 l/s is cooled and compressed, causing some but not all of the vapor to condense. (treat this process as a single-unit operation.) liquid and vapor product streams emerge from the process in equilibrium at t (°c) and 1100 mmhg. the vapor product contains 60.0 mole% butane. determine: a)the required final temperature (t) b)the composition of the liquid product (component mole fractions) c)the molar flow rates of the liquid and vapor products.

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg. m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?