All categories

3 years ago

How much energy is required to heat the solid iron from 1535 ∘C to 2000 ∘C?

Chemistry

1 answer:

Maslowich3 years ago

4 0

Answer:

$Q=206.46\frac{J}{g}$

Explanation:

Hello,

In this case, since the energy due to the change of temperature is computed via:

$Q=mCp\Delta T$

Thus, since the specific heat of iron is 0.444 J/(g°C), the heat per unit of mass turns out:

$Q=0.444\frac{J}{g\°C}(2000-1535)\°C\\ \\Q=206.46\frac{J}{g}$

Best regards.

You might be interested in

Need the ionic formula

JulijaS [17]

Answer:

To find the formula of an ionic compound, first identify the cation and write down its symbol and charge. Then, identify the anion and write down its symbol and charge. Finally, combine the two ions to form an electrically neutral compound.

Explanation:

3 0

3 years ago

Calculate the mass percent of titanium in the mineral ilmenite, FeTiO3. What mass of ilmenite (in grams) is required if you wish

muminat

We are given the mineral ilmenite with a molecular formula of FeTiO3. The molar mass of the compound is equal to 151.72 g/mol. The percent titanium thus is 31.55 percent.when 750 grams of titanium is present, the mass of ilmenite is equal to 2377.18 grams

4 0

3 years ago

PLEASE HELP OR EXPLAIN!!

Naddik [55]

The third one beacuse if you count all the atoms of every one you will find that one the left side, you have 3 h and on the right you have 2 h

7 0

3 years ago

How has the taxonomy of organisms changed over time

neonofarm [45]

Answer:

When scientist find new species that may have to change classification systems in order to accommodate them. DNA sequencing has also let us find out more about evolutionary relationships. The more recent the common ancestor, the more closely related the two species are.

Explanation:

8 0

3 years ago

1. Which of the following is a correctly written thermochemical equation?

WITCHER [35]

Explanation:

1. Thermochemical equation is balance stoichiometric chemical equation written with the phases of the reactants and products in the brackets along with the enthalpy change of the reaction.

The given correct thermochemical reactions are:

$Fe(s)+O_2(g)\rightarrow Fe_2O_3(s),\Delta H = 3,926 kJ
$

$C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2 (g)+4H_2O(l),\Delta H= 2,220 kJ/mol$

2. Phase change affect the value of the enthalpy change of the thermochemical equation. This is because change in phase is accompanied by change in energy. For example:

$H_2O(s)\rightarrow H_2O(g),\Delta H_{s}=51.1 kJ/mol$

$H_2O(l)\rightarrow H_2O(g),\Delta H_{v}=40.65 kJ/mol$

In both reaction phase of water is changing with change in energy of enthalpy of reaction.

7 0

3 years ago

Read 2 more answers