3 years ago

How many ions are present in iron 2 oxide

1 answer:

8 0

Iron(II) oxide also refers to a family of related non-stoichiometric compounds, which are typically iron deficient with compositions ranging from Fe0.84O to Fe0.95O.

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Consider the dissolution of ammonium nitrate. 1.25 g of amminum nitrate is dissolved in enough water to make 25.0 mL of solution

Mrac [35]

Answer:

$\Delta H=-0.02\ kJ$

Explanation:

The expression for the calculation of the enthalpy change of a process is shown below as:-

$\Delta H=m\times C\times \Delta T$

Where,

$\Delta H$ is the enthalpy change

m is the mass

C is the specific heat capacity

$\Delta T$ is the temperature change

Thus, given that:-

Mass of ammonium nitrate = 1.25 g

Specific heat = 4.18 J/g°C

$\Delta T=21.9-25.8\ ^0C=-3.9\ ^0C$

So,

$\Delta H=-1.25\times 4.18\times 3.9\ J=-20.3775\ J$

Negative sign signifies loss of heat.

Also, 1 J = 0.001 kJ

So,

$\Delta H=-0.02\ kJ$

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3 years ago