How to Calculate Delta H F By Robert Schrader; Updated April 24, 2017 In a chemical reaction, both reactants and the products they form have what are called heats of formation. Expressed by the symbol ÎHf (delta HF), heats of formation are an important part of understanding energy transfer during chemical reactions. In order to calculate ÎHf for any product or reactant, you must have on hand the total amount of heat the reaction produces (ÎH), as well as the ÎHf value for all the other reactants and/or products, all of which your chemistry problem will provide you.
Africa (Toto song) Africa is a 1982 song by the American rock band Toto. It was included on their 1982 album Toto IV, and released as a single on September 30, 1982. It reached number one on the US Billboard Hot 100 chart on February 5, 1983 and number three on the UK Singles Chart the same month.
Blue Eyes Crying in the Rain. From Wikipedia, the free encyclopedia. Blue Eyes Crying in the Rain is a song written by songwriter Fred Rose. Originally performed by Roy Acuff, the song was later recorded by Willie Nelson as part of his 1975 album Red Headed Stranger.