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3 years ago

Why does heating an object increases its thermal energy?

2 answers:

7 0

All objects contain internal energy. Some of this is due to the movement of the particles in the object. When an object is heated, its particles move more vigorously and its internal energy increases.

Phoenix [80]3 years ago

6 0

Answer:

the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.

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consider the reaction between calcium oxide and carbon dioxide: cao ( s ) + co 2 ( g ) → caco 3 ( s ) a chemist allows 14.4 g of

MakcuM [25]

Answer:

CaO is the limiting reagent

Theoritical yield = 25.71 g

% Yield = 75.44%

Explanation:

1 mole = Molar mass of the substance

Molar Mass of CaO = 56 g/mol

Molar Mass of CaCO3 = 100 g/mol

Molar mass of CO2 = 44 g/mol

The balanced Equation is :

$CaO + CO_{2}\rightarrow CaCO_{3}$

1 mole of CaO reacts with = 1 mole of CO2

56 g of CaO reacts with = 44 g of CO2

1 g of CaO reacts with =

$\frac{44}{56}$

= 0.785 g of CO2

So,

14.4 g of CaO must react with = (14.4 x 0.785) g of CO2

= 11.31 g of CO2

Needed = 11.31 g

Available CO2 = 13.8 g (given)

So CO2 is in excess , hence CaO is the limiting reagent and product will produce from 14.4 g of CaO

$CaO + CO_{2}\rightarrow CaCO_{3}$

1 mole of CaO will produce 1 mole pf CaCO3

56 g of CaO produce = 100 g of CaCO3

1 g of CaO produce =

$\frac{100}{56}$

= 1.785 g of CaCO3

14.4 g of CaO will produce = (1.785 x 14.4) g of CaCO3

= 25.71 g of CaCO3

Theoritical Yield of CaCO3 = 25.71 g

Actual yield = 19.4 g

Percent Yield =

$\frac{Actual\ yield}{Theoritical\ yield}\times 100$

$\frac{19.4}{25.71}\times 100$

= 75.44 %

6 0

3 years ago

“The __________ means that _____________because _________________” “ The ______________(increases/decreases) as _______________”

Yanka [14]

Answer: load the pdf

Explanation:

8 0

3 years ago

What property of water is primary for living organisms? (SC.6.E.7.4) *

joja [24]

Answer: it is liquid at most temperatures on earth.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Fluorine is a gas and iodine is a solid, yet all halogens are non-polar and would interact with London dispersion forces. This i

attashe74 [19]

Answer:

the molecules of each substance attract each other through dispersion (London) intermolecular force.whether a substance is solid, liquid or gas depends on the balance between the kinetic energies of the molecules and their intermolecular attractions.

thank you.

6 0

3 years ago

How many moles of NH₃ can be produced from 4.81 moles of nitrogen in the following reaction:

makkiz [27]

Answer:

9.62moles of NH₃

Explanation:

Given parameters:

Number of moles of nitrogen = 4.81moles

Unknown:

Number of moles of NH₃ = ?

Solution:

To solve this problem, we need to establish a balanced reaction equation:

N₂ + 3H₂ → 2NH₃

Now, we can solve the problem by working from the known to the unknown.

1 mole of N₂ produced 2 moles of NH₃

4.81moles of N₂ will produce 2 x 4.81 = 9.62moles of NH₃

8 0

3 years ago