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3 years ago

Cooling a gas in a rigid container causes

Chemistry

1 answer:

maxonik [38]3 years ago

4 0

Answer:

Explanation:

Presumably the system is closed (nothing can escape or enter).

A: You're cooling the container so it shouldn't explode.

C: If the container is Closed, the volume cannot increase or decrease.

D: is also impossible for the closed container reason.

B: The pressure has to decrease because the molecules are moving slower which decreases their velocity. If that happens the Force goes down.

B: Answer

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In which chemical reaction will be heat content of the reactance be more that of the products

Anuta_ua [19.1K]

A reaction in which energy is absorbed from the surroundings is called anendothermic reaction. In endothermic reactions the enthalpy of the products is greater than the enthalpy of the reactants. Because reactions release or absorb energy, they affect the temperature of their surroundings.

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4 years ago

Ksivusya [100]

Answer:

AYAYYA

Explanation:

YEA

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3 years ago

Read 2 more answers

One gram of liquid benzene is burned in a bomb calorimeter. The temperature before ignition was 20.826 ℃, and the temperature af

gtnhenbr [62]

Answer:fH = - 3,255.7 kJ/mol

Explanation:Because the bomb calorimeter is adiabatic (q =0), there'is no heat inside or outside it, so the heat flow from the combustion plus the heat flow of the system (bomb, water, and the contents) must be 0.

Qsystem + Qcombustion = 0

Qsystem = heat capacity*ΔT

10000*(25.000 - 20.826) + Qc = 0

Qcombustion = - 41,740 J = - 41.74 kJ

So, the enthaply of formation of benzene (fH) at 298.15 K (25.000 ºC) is the heat of the combustion, divided by the number of moles of it. The molar mass od benzene is: 6x12 g/mol of C + 6x1 g/mol of H = 78 g/mol, and:

n = mass/molar mass = 1/ 78

n = 0.01282 mol

fH = -41.74/0.01282

fH = - 3,255.7 kJ/mol

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3 years ago

Soda ash (sodium carbonate) is widely used in the manufacture of glass. Prior to the environmental movement much of it was produ

egoroff_w [7]

Answer:

NaCl is the limiting reactant

18.0g of CaCO3 are in excess

113.4g Na2CO3 are produced

118.7g CaCl2 are produced

Explanation:

To solve this question we need to convert the mass of each reactant to moles in order to find the limitng and excess reactant to find the amount of products that would be produced:

Moles CaCO3:

125g * (1mol / 100.09g) = 1.25 moles

Moles NaCl:

125g * (1mol / 58.44g) = 2.14 moles

For a complete reaction of 2.14 moles of NaCl are required:

2.14 moles NaCl * (1mol CaCO3 / 2 mol NaCl) = 1.07 moles of CaCO3.

As there are 1.25 moles, Calcium carbonate is the excess reactant and NaCl the limiting reactant

The moles of CaCO3 in excess are:

1.25mol - 1.07mol = 0.18mol CaCO3 and the mass is:

0.18mol CaCO3 * (100.09g / mol) = 18.0g of CaCO3 are in excess

The moles of Na2CO3 and CaCl2 produced are:

2.14 moles NaCl * (1mol Na2CO3-1mol CaCl2 / 2 mol NaCl) = 1.07 moles are produced.

The masses are:

1.07 mol Na2CO3 * (105.99g / mol) = 113.4g Na2CO3

1.07 mol CaCl2 * (110.98g / mol) = 118.7g CaCl2

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3 years ago

9. Diamonds and quartz crystals look very similar but diamonds cost considerably

zheka24 [161]

Natural diamonds are made very deep within earth's surface where high temperatures and pressure exist naturally, thus making them much more difficult to obtain, and making them a more expensive option that Swarovski Crystal.

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3 years ago