64g of o2 is present at 25°c and 1atm pressure. molar heat capacity of oxygen at constant pressure is equal to 29.33 j/k mol. find values of q in the following processes (a) doubling the gas volume under reversible isothermal conditions (b) doubling the gas volume in isobaric conditions (c) doubling gas pressure in isochoric conditions

On solidification from a melt, the polymer polyethylene forms a semi-crystalline spherulite structure. (i) sketch an individual spherulite and label the amorphous and crystalline regions. (ii) draw a schematic to show the changes in specific volume with temperature during cooling from the melt, comparing it to the theoretical extremes of fully crystalline and fully amorphous (indicate tm and tg)