Chemistry: In the reaction, 210 kJ of heat energy is used to form 3.0 moles of hydrogen. Calculate how much heat energy is needed to make 1000 kg of hydrogen.

The best option i think is b would be my best answer...

In the reaction, 210 kJ of heat energy is used to - id2109496109, skylarjohnson2683

Ответ:

autumnskye1

11.02.2022

Chemistry

Heat energy needed : 3.5 x 10⁷ kJ

Further explanation

Heat is a form of energy that can flow from high-temperature objects to low-temperature objects.

So heat moves when there is a difference in temperature and can increase or decrease the temperature. An object that receives a lot of heat will cause a large increase in temperature

The amount of heat is influenced by the mass of the object and the difference in temperature

Can be formulated

Q = m.c.Δt

Q: heat received or removed by an object (J)

m: object mass (kg)

c: heat type substance (J / kg⁰C)

ΔT: temperature change (⁰C)

210 kJ of heat energy is used to form 3.0 moles of Hydrogen, so heat energy for 1 mol Hydrogen :

$\tt \dfrac{210}{3}=70~kJ/mol$

mol of 1000 kg of Hydrogen=10⁶ g(MW=2 g/mol)

$\tt \dfrac{10^6~g}{2}=5.10^5$

The heat energy :

$\tt 70~kJ/mol\times 5.10^5~mol=3.5\times 10^7~kJ$

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In the reaction, 210 kJ of heat energy is used to form 3.0 moles of hydrogen. Calculate how much heat energy is needed to make 1000 kg of hydrogen.

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