The melting point of substance X is -20 degrees Celsius and the boiling point is 90 degrees Celsius. How many Celsius degrees are there between the melting point and the boiling point?
20
70
90
110
The melting point of substance X is -20 degrees Celsius and the boiling point is 90...
Acetone has a melting point of -95degree Celsius and a boiling point of 56 degrees Celsius. Which phase (solid, liquid, or gas) is present at the following temperature?1. Inside this room(25 degree Celsius) . 2 . Dark side of the moon ( - 153 degrees Celsius) . 3. Outside on a very cold winter morning (-5 degrees Celsius). 4. Light side of the moon (123 degrees Celsius) . 5 . Very hot summer day (38 degrees Celsius)
If the boiling point of a solution was 101.8 degrees Celsius and the boiling point of pure water under the same conditions was 99.7 degrees Celsius, what is the molality of the solution?
Measured boiling point of ethanol/water mixture: 79 degrees Celsius Known value of boiling point mixture: 156.11 degrees Celsius - Comment on the measured boiling point of your distillate vs. the “known” value you looked up prior to the lab session. Calculate the percent error between these numbers.
Ethyl alcohol has a boiling point of 78.0 degrees Celsius, a freezing point of -114 degrees Celsius, a latent heat of vaporization of 879 kJ/K, a latent heat of fusion of 109 kJ/K, and a specific heat of 2.43 kJ/kg.K. How much energy must be removed from 0.510 kg of ethyl alcohol that is initially a gas at 78.0 degrees Celsius so that it becomes a solid at -114 degrees Celsius?
Melting Point of p-dichlorobenzene 75.9 Melting Point of acetamide 53.2 degrees C Melting Point of solid mixture 53.8 degrees C Boiling Point of acetone 55.8 degrees C Boiling Point of ethyl alcohol 77.6 degrees C Boiling Point of acetone/ethyl alcohol mixture 72.7 What can you conclude about the melting points of pure and impure solids?
Melting and Boting Points AJAK EVROS? COTT <Free Energy and Equilibrium Melting and Boiling Points At equilibrium, the free energy change. AG, of any system is zero. AG=0 AH-TAS So, under equilibrium conditions, this equation can be rearranged as T = AH This form of the equation can be used to calculate the temperature at which the equilibrium occurs. Since a phase change represents an equilibrium between two phases, melting and boiling points can be calculated by this method. norr...
An aqueous solution of a nonvolatile solute has a boiling point of 102.45 degrees Celsius. Knowing that for water, Kfp = 1.86 degrees Celsius m^-1 and Kbp= 0.51 degrees Celsius m^-1. What is the molality of the solution? and what is the freezing point of the solution? Please show work.
Liquid ammonia (boiling point = -33.4 degrees Celsius) can be usedas a refrigerant and heat transfer fluid. how much energy is neededto heat 25.0 g of NH3 (liquid) from -65.0 degreesCelsius to -12.0 degrees Celsius ? specific heat capacity, NH3 (liquid) 4.7 J/ (g x k) specific heat capacity, NH3 (gas) 2.2J/ (g x k) heat ofvaporization 23.5 kJ/mol molarmass, 17.0 g/mol correct answer: 39 kJ please show me step by step how to solve this problem, i'm notgetting the correct answer...
Shape, melting point & solubility (2.5 pts) When melting or boiling a substance (both of which are physical changes), which kinds of attractions may be broken? Circle all that apply. hydrogen bonding covalent bonds dipole-dipole London forces vs. If I told you that only one of these molecules is a solid at room temperature, which one is that more likely to be? How can you tell from the structure? Circle the hydrophilic portion of the molecules above and put a...