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3 years ago

The direct transfer of heat from one substance to another substance that it is touching is called

Chemistry

2 answers:

Oksanka [162]3 years ago

6 0

Thermal energy is the direct transfer of heat from one substance to another

Allushta [10]3 years ago

5 0

The correct answer is conduction because you are conducting the heat through something like a finger etc.

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2 The substance has a mass of 0.50 kg.

katen-ka-za [31]

Answer:

68000J/kg

Explanation:

Given parameters:

Mass of the substance = 0.5kg

Quantity of heat transferred to the body = 34000J

Unknown:

Specific latent heat of fusion = ?

Solution:

The specific latent heat is usually involve in phase changes;

H = mL

H is the quantity of heat supplied

m is the mass

L is the specific latent heat

Insert the parameters and solve;

34000 = 0.5 x L

L = $\frac{34000}{0.5}$ = 68000J/kg

5 0

2 years ago

How did the discoveries of scandium (sc) and germanium (ge) affect mendeleevâs work?

lukranit [14]

they showed mandeleeves predictions were correct

3 0

3 years ago

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Assuming that the bath contains 250.0 g of water and that the calorimeter itself absorbs a negligible amount of heat, calculate

Anvisha [2.4K]

Answer:

$-3272$ kJ/mol

Explanation:

Given and known facts

Mass of Benzene $= 0.187$ grams

Mass of water $= 250$ grams

Standard heat capacity of water $= 4.18$ J/g∙°C

Change in temperature ΔT $= 7.48$ °C

Heat

$=250 * 4.18 * 7.48\\=7816.6 \\=7.82$

Heat released by benzine is - 7.82 kJ

Now, we know that

$0.187$ grams of benzene release $= -7.82$ kJ heat

So, $1$ g benzine releases

$\frac{ -7.82 }{0.187}\\= -41.8$

kJ/g

$0.187 * \frac{1}{78.108}=0.00239$ mol C6H6

Heat released

$= \frac{-7.82}{ 0.00239}$

$=-3272$ kJ/mol

4 0

3 years ago

Which of the following is an anion?

satela [25.4K]

A . O2- because it is a negatively charged ion

5 0

3 years ago

Is chemistry hard in grade 11<br>explain to me everything plsss thanks

damaskus [11]

Answer: yes it’s hard

Explanation:

8 0

2 years ago

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