Derive the entropy change: when mixing xa mol of a atoms and xb mol of b atoms in ideal solution hints: all configurations of a and b atoms mixing together: 2) δsmix =-r(xa in x^ + xb in xb) (na+nb)! ωconfi contgnan = g apply sterling's approximation: in n n in - n

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs