effective molecular weight

effective molecular weight

[ə′fek·tiv mə‚lek·yə·lər ′wāt]
(petroleum engineering)
Empirical relationship of oil graphed against API (American Petroleum Institute) gravity to give the effective (pseudoaverage) molecular weight of the oil for reservoir calculations.
References in periodicals archive ?
Radosz and co-workers surmised that the hydroxy groups allowed two chains to aggregate through hydrogen bonding, which increased their effective molecular weight.
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