Explain the difference between a theory and scientific law

2 answers:

8 0

Theory- a supposition or a system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.

Scientific law- a statement based on repeated experimental observations that describes some aspect of the universe.

Burka [1]3 years ago

3 0

A scientific theory is an in depth explanation of a observed phenomena And scientific law is simply an observation of the phenomenon that the theory attempts to explain. like when newton saw an apple fall form a tree he observed a phenomena which is called the law of gravity the law states that every time you drop an apple it will fall to the ground and the theory would explan why the apple falls to the ground.

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2. A reaction vessel is charged with hydrogen iodide, which partially decomposes to molecular hydrogen and iodine:2HI (g) H2(g)

Deffense [45]

Answer:

The value of Kp at this temperature is 7.44*10⁻³

Explanation:

Chemical equilibrium is established when there are two opposite reactions that take place simultaneously at the same speed.

For the general chemical equation for a homogeneous gas phase system:

aA + bB ⇔ cC + dD

where a, b, c and d are the stoichiometric coefficients of compounds A, B, C and D, the equilibrium constant Kp is determined by the following expression:

$Kp=\frac{P_{C} ^{c} *P_{D} ^{d} }{P_{A} ^{a} *P_{B} ^{b} }$

Where Px is the partial pressure of each of the components once equilibrium has been reached and they are expressed in atmospheres. The equilibrium constant Kp depends solely on temperature and is dimensionless.

In the case of the reaction:

2 HI (g) ⇔ H₂ (g) + I₂ (g)

the equilibrium constant Kp is determined by the following expression:

$Kp=\frac{P_{H_{2} } *P_{I_{2} } }{P_{HI} ^{2} }$