The standard enthalpy of formation. The enthalpy of formation is the energy change when 1 mole of a substance is formed from its constituent elements in their standard states.Particular points to note: 1  The elements are in their usual states under standard conditions. i.e at 25ÂºC and 1 atmosphere pressure (100 kPa).he standard enthalpy of formation. The enthalpy of formation is the energy change when 1 mole of a substance is formed from its constituent elements in their standard states.
Microsoft bumped the layout to 104 keys with the addition of Windows keys and a Menu key a bit later, but the layout is essentially the same. This is a rule-of-thumb, as no two keyboards are exactly the same. The number of keys on a full size keyboard varies, some having media keys, etc.
, those keys will act as keypad keys when you press the FN button. Keypad keys are 7, 8, 9, u, i, o, j, k, l and m buttons. If on your laptop you can't find keys with tiny numbers-try them. From user: For those of you that don't have Key Pad, try [FN] + [F11] it may open a calculator-like keypad.