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4 years ago

How would a system in which both matter and energy are exchanged freely between the system and the surroundings be classified?

Chemistry

2 answers:

Orlov [11]4 years ago

7 0

The answer should be a closed system

Zanzabum4 years ago

4 0

Answer: Open System

Explanation: System can be classified into 3 types-

a) Open System - In this kind of system, matter and energy both are exchanged freely with the surroundings.

Example - A tea in a container with the open lid.

b) Closed System - In this kind of system, matter cannot be exchanged but energy can be exchange with the surroundings.

Example - A tea in the container with closed lid.

c) Isolated System - In this, neither energy or matter can be exchanged with the surroundings.

Example - A tea in an insulated thermal flask.

Thus the system in which matter and energy are exhanged freely between the syste and the surroundings is classiifed as Open System.

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Why is carbon added to iron? It lowers iron’s boiling point. It makes iron’s lattice structure harder and stronger. It increases

bazaltina [42]

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increases iron’s conductivity.

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3 years ago

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Which of the following changes are chemical changes?

Rashid [163]

Answer:

Gasoline is burning

Explanation:

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3 years ago

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What is Potential energy

Alex_Xolod [135]

Answer:

energy that's waiting to happen

Explanation:

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3 years ago

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Helppppppppppppppppp

igor_vitrenko [27]

Answer:

0.028578 km

Explanation:

The following data were obtained from the question:

Length of whale (in mm) = 28578 mm

Length of whale (in km) =?

We can convert 28578 mm to km by doing the following:

Recall:

1 mm = 1×10¯⁶ Km

Therefore,

28578 mm = 28578 mm × 1×10¯⁶ Km / 1 mm

28578 mm = 0.028578 km

Thus, 28578 mm is equivalent to 0.028578 km

The length of whale (in km) = 0.028578 km

3 0

3 years ago

Boiling point of a solution formed when 15.2 grams of CaCl2 dissolves in 57.0 g of water. kB= 0.512 c/m.

Nookie1986 [14]

100.133 degree celsius is the boiling point of the solution formed when 15.2 grams of CaCl2 dissolves in 57.0 g of water.

Explanation:

Balanced eaquation for the reaction

CaCl2 + 2H20 ⇒ Ca(OH)2 + HCl

given:

mass of CaCl2 = 15.2 grams

mass of the solution = 57 grams

Kb (molal elevation constant) = 0.512 c/m

i = vont hoff factor is 1 as 1 mole of the substance is given as product.

Molality is calculated as:

molality = $\frac{grams of solute}{grams of solution}$

= $\frac{15.2}{57}$

= 0.26 M

Boiling point is calculated as:

ΔT = i x Kb x M

= 1 x 0.512 x 0.26

= 0.133 degrees

The boiling point of the solution will be:

100 degrees + 0.133 degrees (100 degrees is the boiling point of water)

= 100.133 degree celcius is the boiling point of mixture formed.

4 0

3 years ago