Also known as the Pearson product-moment correlation coefficient, the correlation coefficient (r) measures the linear relationship between two variables, with a value range of -1 to 1. A value close to 1 indicates there is a strong positive linear correlation between two variables; that is, when one variable increases so does the other.
A short definition. Delta H of a reaction is the enthalpy of reaction. H of products minus H of reactants. Each compound has a delta H of formation (dHf). The heats of formation for each substance in a reaction can be added together to compute the energy change for a reaction.
Delta (letter) (Î´ or Î´), a letter of the Greek alphabet. D (letter), called Delta in the NATO phonetic alphabet. Delta Air Lines, a American airline Delta Connection, a regional airline brand name for Delta Air Lines. Delta Express, a former no-frills brand owned and operated by Delta Air Lines from 1996 to 2003. Delta Shuttle, the brand name for Delta Air Lines' hourly air shuttle services.