Question 6 liquid crystalline phase, the component molecules are aligned along their long ais In the and are arranged in layers with the molecules in each plane twisted slightly in relation to the molecules in the planes above and below. O smectic B nematic smectic C O smectic A O cholesteric Next Previous Question 13 liquid crystal has the least order and is the most liquid-like. O smectic O cholesteric o nematic smectic B smectic C Previous Question 14 1 pt Ethanol (C2HsOH) melts at -114 °C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -135 °C to liquid ethanol at -50 °C? O 4192 O-12.7 O 9.21 O207.3 6.91 Question 17 The relative humidity of air equals the ratio of the partial pressure of water in the air to the equilibrium vapor pressure of water at the same temperature times 100%. If the relative humidity of the air is 58% and its temperature is 68 °F, how many moles of water are present in a room measuring 12 ft x 10 ft x 8 ft? The vapor pressure of water at 68 °F is 17.54 torr. Previous Next Not saved Submit C Question 19 Using the thermodynamic data in your book, calculate the minimum numbe that must be combusted to provide the energy necessary to convert 5.50 kg of ice at -20 °C to liquid water at 75 °C. r of grams of propane Previous Not saved z Instructions Question 18 1 p The vapor pressure of a volatile liquid can be determined by slowly bubbling a known volume of gas through it at a known temperature and pressure. In an experiment, 5.00 L of N2 gas is passed through 7.2146 g of liquid benzene at 260 °C. The liquid remainying after the experiment weighs 5.1493 g. Assuming that the gas becomes saturated with benzene vapor and that the total gas volume and temperature remain constant, what is the vapor pressure of the benzene in torr? Nex 4 Previous Not saved Submit Qui