It takes 330 j of energy to raise the temperature of 14.6 g of benzene from 21.0 °c to 28.7 °c at constant pressure. what is the constant-pressure molar heat capacity of benzene?

The mathematical expression for heat capacity at constant pressure is given as:

  (1)

where, Q = heat capacity

=  molar heat capacity at constant pressure

= change in temperature

n = number of moles

Therefore, =

=

Number of moles  =

=

= 0.186 mole

Put the values in formula (1)

(conversion of degree Celsius into kelvin)

=

= 6.32 J /mol K

Hence, molar heat capacity of benzene at constant pressure  =

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

< 3

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