The molar heat capacity cp, mof is described by the following equation over the range : + 1.035 * 10-9 t3 k3 cp, m r = 3.093 + 6.967 * 10-3 t k - 45.81 * 10-7 t2 k2 300 k 6 t 6 1700 k so2(g) (0cv> 0v)t k = -1> v (0v> 0p)t in this equation, t is the absolute temperature in kelvin. the ratios tn/kn ensure that cp, m has the correct dimension. assuming ideal gas behavior, calculate q, , , and if 1.50 moles of is heated from 22.5°c to 1140.°c at a constant pressure of 1 bar. explain the sign of .

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the answer to this question is 3.