Assess 6 lbm of air in a vessel with heat added to raise the temperature from 70 degrees F (530 o R), 12 psia to 650 degrees F (1110 o R). Use the ideal gas equation to estimate the final pressure. Assume that density and Rg are constant in initial and final states. Apply the entropy equation found on slide 11 in Lecture 11b to calculate the entropy rise. (

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".