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horsena [70]
3 years ago
5

Calorimeter containing 1000 grans of water the initial temperature of water is 24.85 degrees . the heat of water is 4.184 j/g de

grees the heat capacity of the calorimeter is 695 j/ c after the reaction the final temperature of the water is 35.65
calculate the change of temperature
Chemistry
1 answer:
kvasek [131]3 years ago
3 0
<h3><u>Answer;</u></h3>

10.80 ° C

<h3><u>Explanation;</u></h3>

From the information given;

Initial temperature of water =  24.85°C

Final temperature of water = 35.65°C

Mass of water = 1000 g

The specific heat of water ,c = 4.184 J/g °C.

The heat capacity of the calorimeter  = 695 J/ °C

Change in temperature ΔT = 35.65°C - 24.85°C

                                             = 10.80°C

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Select the correct location on the image
Lera25 [3.4K]

The orbital filled by the last electron from the S element is 3p

<h3>Further explanation </h3>

In an atom there are levels of energy in the skin and sub skin.

This energy level is expressed in the form of electron configurations.

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub skins in the skin of an atom, namely s, p, d and f. The maximum number of electrons for each sub skin is

• s: 2 electrons

• p: 6 electrons

• d: 10 electrons and

• f: 14 electrons

Charging electrons in the sub skin uses the following sequence:

<em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc. </em>

Each sub-skin also has an orbital depicted in the form of a square in which there are electrons symbolized by half arrows.

Each orbital in an atom consists of 4 quantum numbers:

  • n is the principal quantum number.
  • l is the angular momentum / azimuthal quantum number
  • ml, the magnetic quantum number
  • ms, the electron-spin quantum number

Value of n: positive integer

value of l: s = 0, p = 1, d = 2, f = 3, ... (n-1)

ml value: between -l to + l

ms value: +1/2 or -1/2

An sulfur atom (S) has 16 electrons means having an electron configuration as follows:

1s², 2s², 2p⁶, 3s², 3p⁴

or we can write with the noble gas symbol

[Ne] 3s² 3p⁴

From this configuration, it has been seen that the last electron (16th electron) occupies a 3p orbital (3p⁴) orbital with a downward symbol

The quantum number:

n = 3

l = 1

ml = -1

ms = -1/2

<h3>Learn more </h3>

electron transitions

brainly.com/question/2079874

the locations and properties of two electrons

brainly.com/question/2292596

It's sublevel

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a possible full set of quantum numbers

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Keywords: orbitals, subshells, quantum numbers

7 0
3 years ago
Read 2 more answers
Which measurement describes the pressure of a gas?
pychu [463]

Answer:

725 mmHg

Explanation:

mmHg is a sort of unit to determine pressure.

g/L, is a unit for density

2.5L is a value for volume

315K is a value for Asbolute T° (Kelvin grade)

3 0
3 years ago
Calculate the specific volume of Helium using the compressibility factor. 500 kPa, 60 degrees Celsius
IrinaK [193]

Explanation:

Formula for compressibility factor is as follows.

                     z = \frac{P \times V_{m}}{R \times T}

where,     z = compressibility factor for helium = 1.0005

               P = pressure

          V_{m} = molar volume

                R = gas constant = 8.31 J/mol.K

                T = temperature

So, calculate the molar volume as follows.

                V_{m} = \frac{z \times R \times T}{P}

                             = \frac{1.0005 \times 8.314 \times 10^{-3} m^{3}.kPa/mol K \times (60 + 273)K}{500 kPa}

                             = 0.0056 m^{3}/mol

As molar mass of helium is 4 g/mol. Hence, calculate specific volume of helium as follows.

                    V_{sp} = \frac{V_{m}}{M_{w}}

                           = \frac{0.0056 m^{3}/mol}{4 g/mol}

                           = 0.00139 m^{3}/g

                           = 0.00139 m^{3}/g \times \frac{1 g}{10^{-3}kg}

                                 = 1.39 m^{3}/kg

Thus, we can conclude that the specific volume of Helium in given conditions is 1.39 m^{3}/kg.

7 0
3 years ago
HELP!
MAVERICK [17]

Answer:

C

Explanation:

energy cannot be created or destroyed like solar energy for instance. it is already energy because it comes from the sun and for other reason.

Hope this helps!

4 0
3 years ago
Iron, a metal, has which of the following features?
Nastasia [14]

Answer: A sea of electrons

Explanation:

4 0
3 years ago
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