Answer:
The pressure of the gas inside the plastic bag is 1.971 atm
Explanation:
Since temperature did not change, it means it is constant. This will then be Boyle's law. Thus
P1V1 =P2V2
Where P1 is the initial pressure = 10.2 ATM, P2 is the final pressure which is to be calculated.
V1 is the initial volume = 800.0 mL and V2 is the final volume of the gas = 4.14 L
From the formula,
P2 = P1V1/V2
= 10.2×800÷4.14
= 1.971 atm
1 skeleton equation
Na +O2 =>Na2O
Balanced equation
4Na + O2 =>2 Na2O
2.word equation
Zinc +magnesium phosphide=magnesium + zinc phosphide
Balanced equation
3Zn +Mg3P2 =3Mg+ Zn3p2
3skeleton equation
Al +Br2 =>AlBr3
Balanced equation
2Al +3Br2 => 2AlBr3
4 word equation
Lithium + sulphur =>lithium sulphide
2Li + S => Li2S
The standard enthalpy of reaction should be negative.
<h3>What is enthalpy?</h3>
A thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.
Inside the heat pack are two chemicals that get mixed when you smush them together. As they mix, some weak bonds are broken, which takes a little bit of energy. But new, stronger bonds form which release energy. Releasing that energy causes the surroundings to heat up.
Hence, option B is correct.
Learn more about enthalpy here:
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Answer:
5.Hey Order of reaction is :-
Y>Z>X
6.Phosphorus is soft, waxy and reactive. It reacts with moist air and gives out light. It ignites spontaneously at about 350C and that's why it is stored under kerosene to prevent its reaction in the atmosphere.
it can be also stored in sealed bottles..
Explanation:
mark me as brainliest ❤️
Total mass = 100 + 6.5 = 106.5 g
Specific heat of water = 4.18 Joules/gram °C
Q = mCpΔT
Q = 106.5 x 4.18 x (37.8 - 21.6)
Q = 7177 Joules
Moles of NaOH:
6.5 / (23 + 16 + 1)
= 0.1625
Enthalpy of reaction: 7177/0.1625
= 441.7 kJ/mol NaOH