Styrene-butadiene-rubber (SBR) as compared to natural rubber has
Poorer tensile strength.
poorer resistance to oxidation.
greater amount of heat build-up under heavy loading.
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Phosphoric acid is produced in wet process from phosphate rock and
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be
Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium