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3 years ago

What is the temperature of the substance when it is in its standard state?

Chemistry

2 answers:

Marat540 [252]3 years ago

8 0

The temperature of the substance at standard state is 25 °C.

Explanation

The standard state is the condition defined by the chemistry society to refer the temperature and pressure of any state of matter.

It is fixed for all the three states of matter. The standard state acts as reference for the change in temperature and pressure.

Generally, room temperature and pressure in a room without any external force is termed as standard conditions.

The parameters and properties for chemical reactions and elements are determined with respect to standard conditions for acting as a reference state.

So it is known that the room temperature or standard temperature is 25 °C and pressure is 1 bar.

Alexeev081 [22]3 years ago

5 0

Answer:

what substance????

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An aqueous solution of potassium hydroxide is standardized by titration with a 0.122 M solution of hydrobromic acid. If 22.1 mL

Gemiola [76]

Answer:

The molarity of the potassium hydroxide solution is 0.104 M

Explanation:

Step 1: Data given

Molarity of hydrobromic acid (HBr) = 0.122 M

Volume of potassium hydroxide (KOH) = 22.1 mL = 0.0221 L

Volume of hydrobromic acid = 18.8 mL = 0.0188 L

Step 2: The balanced equation

HBr(aq) + KOH(aq) → KBr(aq) + H2O(l)

Step 3: Calculate moles of HBr

Moles HBr = molarity HBr * volume HBr

Moles HBr = 0.122 M * 0.0188 L

Moles HBr = 0.0022936 moles

Step 4: Calculate molarity of KOH

We need 0.0022936 moles of KOH to neutralize the HBr

Molarity = moles / volume

Molarity KOH = 0.0022936 moles /0.0221 L

Molarity KOH = 0.104 M

The molarity of the potassium hydroxide solution is 0.104 M

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3 years ago

The length of a desk is 3.5 feet. how many centimeters is the length

Delvig [45]

1 foot = 30.48 cm
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Answer = 106.68 cm

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Explanation:

The ideal gases is often written like PV=nRT, where P is pressure, V is volume, n is moles, R is the universal constant of the gases and T is Temperature.

So, in this problem there is a container that is a closed system, therefore n is constant and volume too. The initial point is 1 and the final point is 2, so

V1=V2 ⇒

$\frac{n1RT1}{P1} = \frac{n2RT2}{P2} \\\\\frac{T1}{P1} = \frac{T2}{P2} \\\\T2= \frac{T1P2}{P1} =\frac{170 K 283KPa}{50 KPa} =962.2 K$

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Genrish500 [490]

Answer:

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Explanation:

Entropy refers to the degree of disorderliness of a system. The standard molar entropy of a substance refers to the entropy of 1 mole of the substance vunder standard conditions.

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C3H8 has 11 atoms and hence the highest number of microstates followed by CO2 having three atoms and least of all SO having only two atoms.

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Answer:

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