When you use the Format parameter, Windows PowerShell gets only the properties of the DateTime object that it needs to display the date in the format that you specify. As a result, some of the properties and methods of DateTime objects might not be available.y default, the date-time is displayed in long-date and long-time formats for the system locale. When you pipe a date to cmdlets that expect string input, such as the Add-Content cmdlet, Windows PowerShell converts the DateTime object to a string before adding it to the file.
= 1211 kJ mol-1. Therefore the molar heat of combustion of ethanol is 1211 kJ mol-1 (The molar enthalpy of combustion of ethanol is 1211 kJ mol-1). (Note that the enthalpy change for the reaction is negative because the reaction is exothermic, so the enthalpy change for the reaction is -1211 kJ mol-1, ÎH = - 1211 kJ mol-1)
(b) convert J of one photon to kJ/mol of photons: (1.874574 x 10Â¯ 13 J) x (6.022 x 10 23 molÂ¯ 1) = 1.129 x 10 11 J/mol = 1.129 x 10 8 kJ/mol. Note the use of the unrounded off value for the energy of one photon. Problem #5: What is the energy of a photon of green light with a frequency of 5.76 x 10 14 sÂ¯ 1.se Î½ = c / Î» to get the frequency: x = (3.00 x 10 8 m sÂ¯ 1) / (550 x 10Â¯ 9 m). This equals 5.4508 x 10 14 sÂ¯ 1. I left a couple extra digits in the answer and notice that the wavelength is not in scientific notation.