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)
The symbol for the Universal Gas Constant is Ru= 8.314 J/mol.K (0.0831 bar dm3 mol-1 K-1). The Specific-Heat Capacity, C, is defined as the amount of heat required to raise the temperature by 1K per mole or per kg.The Specific Heat Capacity is measured and reported at constant pressure (Cp) or constant volume (Cv) conditions. For monoatomic gases Cp=2.5Ru J/mol.K and Cv=1.5Ru J/mol.K repectively.The ratio of the two specific heats is called the adiabatic ratio of the gas.t temperature t the heat content of water vapor is: hw = 2501 + 1.84 t. Notice that water vapor, once generated, also requires more heat than dry air to raise its temperature further: 1.84 kJ/kg.C against about 1 k J/kg.C for dry air.