2 years ago

1- What is temperature?

Chemistry

1 answer:

Katen [24]2 years ago

5 0

Answer:

the sum of average kinetic molecules of the body is called temperature..

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What are the reactants and products when butane combusts with excess oxygen?

larisa86 [58]

C3H8 + O2 --> CO2(g) + H2O(g) + energy(heat)

butane + oxygen --> carbon dioxide + water + heat

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3 years ago

How many electrons does oxygen have in its outer shell?

Ne4ueva [31]

6 . 2 in its inner shell & the remaining 6 in its outer shell.

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3 years ago

The combustion of ethene in the presence of excess oxygen yields carbon dioxide and water: c2h4 (g) + 3o2 (g) → 2co2 (g) + 2h2o

meriva

Answer:

$\boxed{-267.5}$

Explanation:

You can calculate the entropy change of a reaction by using the standard molar entropies of reactants and products.

The formula is

$\Delta_{r} S^{\circ} = \sum_n {nS_{\text{products}}^{\circ} - \sum_{m} {mS_{\text{reactants}}^{\circ}}}$

The equation for the reaction is

C₂H₄(g) + 3O₂(g) ⟶ 2CO₂(g) + 2H₂O(ℓ)

ΔS°/J·K⁻¹mol⁻¹ 219.5 205.0 213.6 69.9

$\Delta_{r} S^{\circ} = (2\times213.6 + 2\times69.9) - (1\times219.5 + 3\times205.0)\\\\= 567.0 - 834.5 = \boxed{-267.5 \text{ J}\cdot\text{K}^{-1} \text{mol}^{-1}}$

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3 years ago

Which of the following sources of radiation produced from nuclear power plants poses the largest threat to humans?

oee [108]

The nuclear reactor inside the facility

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3 years ago

Read 2 more answers

On a phrase diagram or heating curve, the freezing point is the same as what ?

yuradex [85]

Answer:

Pelting point.

Explanation:

Freezing point is the same is the melting point.

8 0

3 years ago