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Scrat [10]
3 years ago
6

Which of the following are state functions?: Temperature, Enthalpy, Exergy, Internal Energy, Adiabatic Work, Heat (2 marks) b) P

rovide definitions for the following terms: i) Reversible process ii Ethalpy iii Entropy iv) Internal energy v) Isentropic process v) Adiabatic
Chemistry
2 answers:
Reika [66]3 years ago
6 0

Answer:

a) The state functions are: internal energy, temperature, enthalpy and exergy.

b) Definitions of terms are found in the explanation section.

Explanation:

a) The state functions are those quantities that are used to explain the state of a thermodynamic system.

b) reversible process: a reversible process returns the system to its original state without there being a variation in either the system or the external environment.

enthalpy: heat found in a system.

entropy: is the measure of disorder in a system

internal energy: internal energy is the energy that a molecule or atom possesses in a compound.

isentropic process: in thermodynamics is when there is no change in entropy.

adiabatic: when there is no heat change between the system and the surroundings.

Alex Ar [27]3 years ago
5 0

Answer:

State functions are Temperature, Enthalpy, Energy, Internal Energy and Adiabatic work.

Explanation:

a) State functions are those thermodynamic functions which depends only on the final and initial state of the system but not on the path followed.

From the given options only heat is not a state function.

b)  (i) Reversible Process is the process which can be reversed at any point by making even very small changes in the properties of the system.

(ii) Enthalpy is defined as the total heat content of the system. It can also be written as the sum of internal energy and product of pressure and volume of the system.

(iii) Entropy defines the extent of randomness in any system.

So,  a substance in gaseous state has more entropy than its liquid state as gaseous particles can more freely.

(iv) Internal Energy is the energy that involves both potential and kinetic energy of the system. It involves energy for all sorts of random motions of the particles.

(v) Isentropic processes are processes in which entropy remains constant or entropy change is zero during the process.

(vi) Adiabatic processes are those process in which there is no heat change in the process. For example in thermos flask, there is no exchange of heat between system and surroundings.

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Dovator [93]

Answer:

D

Explanation:

Just look at the groups and their tendencies. Or look at their electron configurations. You will notice that calcium has 2 valence electrons and bromine has 7 valence electrons.

Halogens have the most valence electrons possible without completing a shell (8 would be needed for that)

4 0
3 years ago
Chlorite anion was exposed to strong radiation and had 2 successive electrons removed, creating a chlorite cation. What is the m
katrin [286]

Answer:

bent

Explanation:

The chlorite ion has been pictured in the image attached with its two main resonance contributors.

The ion has four regions of electron density as shown. On the basis of the VSEPR theory, we expect a tetrahedral geometry.

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7 0
3 years ago
A tank with volume of 2.4 cu ft is filled with Methane to a pressure of 1500 psia at 104 degrees F. Determine the molecular weig
Soloha48 [4]

Explanation:

It is known that equation for ideal gas is as follows.

               PV = nRT

The given data is as follows.

     Pressure, P = 1500 psia,     Temperature, T = 104^{o}F = 104 + 460 = 564 R

     Volume, V = 2.4 cubic ft,      R = 10.73 psia ft^{3}/lb mol R

Also, we know that number of moles is equal to mass divided by molar mass of the gas.

                n = \frac{mass}{\text{molar mass}}

            m = n \times W

                = 0.594 \times 16.04

                = 9.54 lb

Hence, molecular weight of the gas is 9.54 lb.

  • We will calculate the density as follows.

                d = \frac{PM}{RT}

                    = \frac{1500 \times 16.04}{10.73 \times 564}

                    = 3.975 lb/ft^{3}

  • Now, calculate the specific gravity of the gas as follows.

  Specific gravity relative to air = \frac{\text{density of methane}}{\text{density of air}}

                         = \frac{3.975 lb/ft^{3}}{0.0765 lb/ft^{3}}

                         = 51.96

6 0
3 years ago
What factors mechanical weathering ?. <br><br><br> Earth Science.
OLga [1]

Answer:

-Growth of plants on the rock.

-Temperature and pressure changes in nature.

-Freezing and thawing of water in cracks of the rock.

-Formation of salt crystals within the rock.

-Burrowing by animals.

those are some factors I know

hope this helped you

4 0
2 years ago
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olganol [36]
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