What is the reflectivity (in percent) needed to keep water at a temperature near its freezing point of 256 K for a planet at 1 AU?
What is the reflectivity (in percent) needed to keep water at a temperature near its freezing...
Name: 1. Indicate whether the following processes are spontaneous or nonspontaneous. (a) Liquid water freezing at a temperature below its freezing point (b) Liquid water freezing at a temperature above its freezing point (c) The combustion of gasoline (d) A ball thrown into the air (e) A raindrop falling to the ground (f) Iron rusting in a moist atmosphere 2. Predict the sign of the entropy change for the following processes. (a) An ice cube is warmed to near its...
ow many grams of sucrose are needed to decrease the temperature of 200.0 mL of water by 1.2 °c, solution freezing point is -1.2°C? Assume the density of water is 1.0 g/mL 4. What is the molar mass of a molecule when 12.5 grams of the molecule is dissolved in 0.500 kg of water and the boiling point of the solution is 100.3 °C?
The freezing point of water is 0.0 degree C. What is the freezing point of a solution of 5.00g of ammonium sulfide in 444 g of water (molar masses In g/mol: N=14.01; H=1.01, S=32.07; O=16.00) One mole of gas A decomposes into one mole of gas B and one mole of gas C with K_P = 1. 8 times 10^-5 at 300 K. If the initial pressure of each gas was 0.150 atm. what were the pressures at equilibrium.
2. Calculate the temperature of freezing and the boiling point of a 0.030 m FeCl solution. The k of water is 0.51°C/m and the krof water is 1.86°C/m. (4 points)
References Use the References to access important values if needed for this question. The normal freezing point of water, H,0 is 0.00 °C and its Kfp value is 1.86 °C/m. Assuming complete dissociation of the electrolyte, if 14.42 grams of are dissolved in 183.4 grams of water what is the freezing point of the solution? ammonium bromide (NH, Br, 97.95 g/mol) oc Submit Answer
17 Marks: 1 What is the freezing point of water made by dissolving 10.74 g of magnesium chloride in 86.59 g of water? The freezing-point depression constant of water is 1.86 °CIm Answer: 18 Marks: 1 What is the freezing point of water made by dissolving 16.31 g of sodium chloride in 93.18 g of water? The freezing-point depression constant of water is 1.86 °C/m. Answer 19 Marks: 1 What is the freezing point of water made by dissolving 46.18...
10. A type of thermometer has temperature readings at the freezing point of water that are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. Find the temperature corresponding to P23. the 23rd percentile. 0 0.9893 O 0.23° O-2.84 O-0.74
The normal freezing point of water, H2O is 0.00 °C and its Kfn value is 1.86 °C/m. Assuming complete dissociation of the electrolyte, if 12.39 grams of sodium nitrate (NaNO3, 85.00 g/mol) are dissolved in 245.8 grams of water what is the freezing point of the solution? The normal boiling point of water, H20 is 100.00 °C and its Kbp value is 0.512 °C/m. Assuming complete dissociation of the electrolyte, if 13.39 grams of potassium chloride (KCI, 74.55 g/mol) are...
Water in a 35 gallon water heater cools to a temperature below 32 degrees F and freezes 1. Fully. Determine the volumetric change in gallons as a result of freezing. 2. The water above is then heated to boiling point under standard atmospheric pressure. - determine the volumetric change in gallons
Water in a 35 gallon water heater cools to a temperature below 32 degrees F and freezes 1. Fully. Determine the volumetric change in gallons as a result of...
The pressure in a gas thermometer is 5100 Pa at the freezing point of water. (a) What is the pressure in this thermometer at the boiling point of water? (b) If the pressure is 5920 Pa, what is the temperature?