All categories

2 years ago

Identify two ways that temperature plays a role in chemical changes.

Chemistry

1 answer:

sergejj [24]2 years ago

3 0

Answer:

Increasing the temperature will cause chemical changes to occur faster. Decreasing the temperature, causes the particles to lose energy which causes them to move around less and slower. The less they move, the less collisions occur, and the less reactions occur between the chemicals = slower reaction rate.

Explanation:

You might be interested in

Why is Mendeleev's suggestions best accepted in the construction of the periodic table

crimeas [40]

Search Results
Featured snippet from the web
Mendeleev's periodic table became widely accepted because it correctly predicted the properties of elements that had not yet been discovered.

8 0

2 years ago

A mixture of 0.682 mol of H2 and 0.440 mol of Br2 is combined in a reaction vessel with a volume of 2.00 L. At equilibrium at 70

ahrayia [7]

Answer: 0.294 mol of $Br_2$ present in the reaction vessel.

Explanation:

Initial moles of $H_2$ = 0.682 mole

Initial moles of $Br_2$ = 0.440 mole

Volume of container = 2.00 L

Initial concentration of $H_2=\frac{moles}{volume}=\frac{0.682moles}{2.00L}=0.341M$

Initial concentration of $Br_2=\frac{moles}{volume}=\frac{0.440moles}{2.00L}=0.220M$

equilibrium concentration of $H_2=\frac{moles}{volume}=\frac{0.536mole}{2.00L}=0.268M$

The given balanced equilibrium reaction is,

$H_2(g)+Br_2(g)\rightleftharpoons 2HBr(g)$

Initial conc. 0.341 M 0.220 M 0 M

At eqm. conc. (0.341-x) M (0.220-x) M (2x) M

The expression for equilibrium constant for this reaction will be,

$K_c=\frac{[HBr]^2}{[Br_2]\times [H_2]}$

we are given : (0.341-x) = 0.268 M

x= 0.073 M

Thus equilibrium concentration of $Br_2$ = (0.220-x) M = (0.220-0.073) M = 0.147 M

$[Br_2]=\frac{moles}{volume}\\0.147=\frac{xmole}{2.00L}\\\\x=0.294 mole$

Thus there are 0.294 mol of $Br_2$ present in the reaction vessel.

7 0

2 years ago

Which is a characteristic of chemical equilibrium but not physical equilibrium

natka813 [3]

Chemical equilibrium is theequilibrium state in which the concentrations of reactants andproducts is not changed with time. ... Theory Physical equilibrium includes the coexistence of two physical states inside the same closed system.Chemical equilibriums include equal rates of forward and backward reactions.

4 0

3 years ago

Describe the relationship between temperature and pressure of a gas. Can you think of a real world example of this relationship?

jonny [76]

It is an proportional relationship
Pressure increases so does temperature and vice versa

7 0

2 years ago

Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group.

Dmitriy789 [7]

Answer:

Explanation:

3 0

2 years ago