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2 years ago

Drop the insta babes :)

Chemistry

2 answers:

Ksivusya [100]2 years ago

5 0

Okay, I will do it just for you honey

bezimeni [28]2 years ago

3 0

I’m a dude bruv I mean if u into that

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Using standard heats of formation, calculate the standard enthalpy change for the following reaction. 2NH3(g) 3N2O(g)4N2(g) 3H2O

trasher [3.6K]

Answer: $\Delta H^{0} = -879.15 kJ/mol$

Explanation: Heats of formation is the amount of heat necessary to create 1 mol of a compound from its molecular constituents. The basic conditions the substance is formed is at standard conditions: 1 atm and 25°C. Each compound has its own heat of formation per mol of compound (kJ/mol), but to an element is assigned a value of zero.

Standard Enthalpy Change is defined as the heat absorbed or released when a reaction takes place. It can be positive or negative, which means reaction is endothermic or exothermic, respectively.

Enthalpy change is calculated as the difference between the sum of heat formation of products and the sum of heat formation of the reactants:

$\Delta H^{0}=\Sigma H^{0}_{f}_{(products)}-\Sigma H^{0}_{f}_{(reactants)}$

For the reaction

2NH₃ + 3N₂O → 4N₂ + 3H₂O

2(-46.2) + 3(82.05) 4(0) + 3(-241.8)

$\Delta H^{0}=3(-241.8)-[ 2(-46.2)+3(82.05)]$

$\Delta H^{0}=-725.4-153.75$

$\Delta H^{0}=-879.15$

The standard enthalpy change for the reaction is $\Delta H^{0}=-879.15$ kJ

8 0

2 years ago

The rate of disappearance of hbr in the gas phase reaction 2hbr(g)?h2(g)+br2(g) is 0.160 m s-1 at 150°c. the rate of appearance

luda_lava [24]

The reaction rates of the substances whether disappearance of a reactant or the appearance of a product are related to each other by the chemical reaction. The reaction rates are related as follows:

rate = rHBr / 2 = rBr2 = rH2

rH2 = 0.160 / 2 = 0.08 M/s

8 0

3 years ago

The______ the forces among the particles in a sample of matter, the more rigid the matter will be.

Alexus [3.1K]

Answer:

Stronger!

Explanation:

The stronger the forces among the particles in a sample of matter, the more rigid the matter will be.

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3 years ago

Which of the following is not a compound? Cl CO2 NaCl HCl

Ahat [919]

The one that is not a compound is Cl

5 0

3 years ago

Which of the following molecules would have the lowest boiling point?

scZoUnD [109]

The CH4 molecule has the lowest molecular weight, so it has the lowest boiling point.

Hope I helped :)

4 0

3 years ago

Drop the insta babes :)​

Drop the insta babes :)