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3 years ago

How molecules react to an increase in temperature.

Chemistry

1 answer:

Slav-nsk [51]3 years ago

8 0

Answer:

An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure. 17.5 “Temperature and Reaction Rate”).

Explanation:

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2 years ago

The density of lead is

Mademuasel [1]

Answer : The volume occupied by lead is, 2.20 mL

Explanation :

Density : It is defined as the mass contained per unit volume.

Formula used for density :

$Density=\frac{Mass}{Volume}$

Given :

Mass of an lead = 25.0 grams

Density of lead = 11.34 g/mL

Now put all the given values in the above formula, we get the volume of lead.

$11.34g/mL=\frac{25.0g}{Volume}$

$Volume=2.20mL$

Therefore, the volume occupied by lead is, 2.20 mL

3 0

3 years ago

The heat of vaporization of water at the normal boiling point, 373.2 K, is 40.66 kJ/mol. The molar heat capacity of liquid water

Tatiana [17]

Answer:

$\Delta _{vap}H(300.2K)=43,658\frac{J}{mol}=43.66\frac{kJ}{mol}$

Explanation:

Hello!

In this case, according to the Kirchhoff's law for the enthalpy change, it is possible to compute the heat of vaporization at 300.2 K by considering the following thermodynamic route:

$\Delta _{vap}H(300.2K)=Cp_{liq}(T_b-T\°)+\Delta _{vap}H\°+Cp_{vap}(T-T_B)$

Whereas the first term stands for the effect of taking the liquid from 298.15 K to 373.15 K, the second term stands for the standard enthalpy of vaporization and the last term that of the vapor from the boiling point to 300.2 K; thus we plug in to obtain:

$\Delta _{vap}H(300.2K)=75.37\frac{J}{mol*K} (373.2K-298.15K)+40,660\frac{J}{mol} +36.4\frac{J}{mol*K}(300.2K-373.2K)\\\\\Delta _{vap}H(300.2K)=43,658\frac{J}{mol}=43.66\frac{kJ}{mol}$

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3 years ago

The number of π molecular orbitals in a molecule is always equal to the number of ________. a. p orbitals used to construct the

Dmitrij [34]

The number of π molecular orbitals in a molecule is always equal to the number of p orbitals used to construct the π bonds.

An electron's position and wave-like behavior within a molecule are described by a mathematical function called a molecular orbital. Chemical, as well as physical properties like the probability of locating an electron in a particular area, can be determined using this function.

A molecular orbital would be created when two atomic orbitals cross one other along the internuclear axis. A molecular orbital is created when two atomic orbitals cross each other sideways.

Therefore, the number of π molecular orbitals in a molecule is always equal to the number of p orbitals used to construct the π bonds.

Hence, the correct answer will be option (a).

To know more about molecular orbitals

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2 years ago

The number of electrons that can be held in the first orbit (closest to the nucleus)

zloy xaker [14]

The answer to the question is 2

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3 years ago

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