(07.03 mc) read the following reactions. reaction 1: cao(s) + co2(g) → caco3(s) reaction 2: h2o(g) → h2o(l) which reaction leads to an increase in entropy? only reaction 1 only reaction 2 both reaction 1 and 2 neither reaction 1 nor 2

Explanation:

Entropy (S) is a measure of the degree of spreading of energy within a system. The more ways that energy can be distributed, the greater the entropy.

Reaction 1

Entropy is decreasing.

The molecules of CO₂ are all moving in different directions and at different speeds, so the thermal energy is widely distributed among many microstates. When they become carbonate ions, they are locked in position in a crystal lattice. They can vibrate only slightly about their equilibrium locations. The number of microstates is enormously reduced, so entropy decreases.

Reaction 2

Entropy is decreasing.

The molecules of H₂O in the gas phase are all moving in different directions and at different speeds, so the thermal energy is widely distributed among many microstates. When they become liquid water, they can slide past each other, but few of them can escape into the vapour phase

Their mobility is greatly reduced. The number of microstates is greatly reduced, so entropy decreases.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.