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3 years ago

Heat is the movement of thermal energy from one place to another. true or false

Chemistry

2 answers:

kykrilka [37]3 years ago

8 0

Thermal energy that is transferred from one substance to another; moves from warmer to cooler objects. So True.

yuradex [85]3 years ago

6 0

Answer: The given statement is true.

Explanation:

When particles of a substance or object attain internal energy due to the kinetic energy of its particles then this energy is known as thermal energy.

So, when two objects of different temperature are kept in contact with each other then this thermal energy flows from hotter object to cooler object.

This is known as heat is flowing from hot object to cool object.

Hence, we can conclude that the statement heat is the movement of thermal energy from one place to another, is true.

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A substance that is dissolved in a solution is called a(n) __________________.

Fudgin [204]

Answer:

A substance that is dissolved in a solution is called a solute

Explanation:

Solute is the substance which is dissolved

Solvent is where you dissolve the solute (usually liquids)

Solution = Solute + solvent

8 0

3 years ago

Read 2 more answers

A sample of pure NO2 is heated to 335 ∘C at which temperature it partially dissociates according to the equation 2NO2(g)⇌2NO(g)+

vodka [1.7K]

The equilibrium constant for the reaction is 0.00662

Explanation:

The balanced chemical equation is :

2NO2(g)⇌2NO(g)+O2(g

At t=t 1-2x ⇔ 2x + x moles

The ideal gas law equation will be used here

PV=nRT

here n= $\frac{w}{W}$ = $\frac{w}{V}$ = density

P = $\frac{density RT}{M}$ density is 0.525g/L, temperature= 608.15 K, P = 0.750 atm

putting the values in reaction

0.75 = $\frac{0.525 x 0.0821 x 608.15 }{M}$

M = 34.61

to calculate the Kc

Kc= $\frac{ [NO] [O2]}{NO2}$

$\frac{1-2x}{1+x}$ x M NO2 + $\frac{2x}{1+x}$ M NO+ $\frac{x}{1+x}$ M O2

Putting the values as molecular weight of NO2, NO,O2

$\frac{46(1-2x) +30(2x)+32x}{1+x}$

34.61= $\frac{46}{1+x}$

x= 0.33

Kc= $\frac{4x^2)x}{1-2x^2}$

putting the values in the above equation

Kc = 0.00662

5 0

3 years ago

Why is the boiling point of 2 nitrophenol different from that of 4 nitrophenol

Ivanshal [37]

Answer:

See explanation

Explanation:

The nature of hydrogen bonding in 2- nitrophenol and 4- nitrophenol is quite different.

In 2- nitrophenol, there is intramolecular hydrogen bonding. As a result of this, the compound has a low boiling point.

Then in 4- nitrophenol, there is intermolecular hydrogen bonding. This accounts for molecular association and higher boiling point in 4- nitrophenol.

5 0

3 years ago

What mass of KCl will produce a saturated solution in 500.0 g of water at 20°C? The solubility of KCl at 20°C is 34.0 g/100 g H2

IgorLugansk [536]

34g -------- 100g H₂O
Xg ---------- 500g H₂O
X = (500×34)/100
<u>X = 170g KCl

</u>:)

5 0

3 years ago

Read 2 more answers

Which of the following compounds are polar: CH2Cl2, HBr?

dybincka [34]

Answer:

CH2Cl2 is polar

Explanation:

6 0

3 years ago