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NemiM [27]
3 years ago
8

What is a variable and what do it do

Chemistry
2 answers:
xz_007 [3.2K]3 years ago
4 0
A variable is a quantity that may change within the context of a mathematical problem or experiment. Typically, we use a single letter to represent a variable. The letters x, y, and z are common generic symbols used for variables.


Variables are used to store information to be referenced and manipulated in a computer program. They also provide a way of labeling data with a descriptive name, so our programs can be understood more clearly by the reader and ourselves. It is helpful to think of variables as containers that hold information.
frosja888 [35]3 years ago
3 0
Varuable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation :)
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Five kilograms of liquid carbon tetrachloride undergo a mechanically reversible, isobaric change of state at 1 bar during which
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Answer:

Explanation:

From the information given:

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= 0.0031 m³

Suppose \beta is independent of temperature while pressure is constant;

Then:

The change in volume can be expressed as:

\int ^{V_2}_{V_1} \dfrac{dV}{V} =\int ^{T_2}_{T_1} \beta dT

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V_2 = V_1 \times exp (\beta (T_2-T_1))

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V_2 = 0.003175 \ m^3

However; the workdone = -PdV

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W = - 7.6 J

The heat energy Q = Δ h

Q = mC_p(T_2-T_1)

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Q = 84 kJ

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ΔU = ΔQ + W

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the   ansnwer is c  mf kf n dsj njnr kgjrk nj ee h ewfkjhnf ewjn  fnkwfnjnfnfunf

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because  is sooo goood

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