Calculate δh⁰298 (in kj) for the process p(s) + 5/2 cl2(g) → pcl5(g) from the following information.
p(s) + 3/2 cl2(g) → pcl3(g) δh⁰298 = −287 kj
pcl3(g) + cl2(g) → pcl5(g) δh⁰298 = −88 kj

for the process is -375 kJ

Explanation:

Given reaction is a combination of the two given elementary steps.Summation of change in standard enthalpy ()of the two elementary reactions give of the reaction .

......

......

-----------------------------------------------------------------------------------------------------

=

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

The think of process to make something successful