All categories

3 years ago

Why was it important to have endothermic and exothermic processes in the building materials of your train?

1 answer:

5 0

Before, trains worked using the steam engine. Thus, it uses heat so it is crucial to apply heat balance. The steam engine absorbs energy during the stage of boiling water. So, this is the endothermic reaction. When the steam is used to work the piston, it has to release this energy through running the train. The excess energy is released as an exhaust to the chimney. This is the exothermic process because it releases energy to the surroundings.

You might be interested in

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory to standardize strong base solutions.

Norma-Jean [14]

$2 KHP(aq) + Ba(OH)_{2}(aq) ---> KP_{2}Ba (aq) + 2 H_{2}O (l)$ \

Moles of $Ba(OH)_{2}$ = $0.483 \frac{mol}{L} * 28.5 mL *\frac{1 L}{1000mL} = 0.0138 mol Ba(OH)_{2}$

Mass of KHP = $0.0138 mol Ba(OH)_{2} * \frac{2 mol KHP}{1 mol Ba(OH)_{2}} * \frac{204.22 g KHP}{1mol KHP}$

= 5.64 g KHP

6 0

3 years ago

Read 2 more answers

The gas in an aerosol can is at a pressure of 3.16 atm at 32.2°C. What would the gas pressure in the can be at 22.9°C?

olasank [31]

Answer:

The pressure of the gas would be 3.06 atm

Explanation:

Amonton's law states that the pressure is directly proportional to the absolute temperature of a gas under constant volume. The equation is:

P1 / T1 = P2 / T2

<em>Where P1 is the initial pressure = 3.16atm</em>

<em>T1 is initial absolute temperature = 273.15 + 32.2°C = 305.35K</em>

<em>P2 is our incognite</em>

<em />

Replacing:

3.16atm / 305.35K = P2 / 296.05K

3.06 atm = P2

<h3>The pressure of the gas would be 3.06 atm</h3>

5 0

3 years ago

A helium balloon at 23 C has a volume of 755 mL. The balloon is placed into a freezer kept at -10 C. Assuming pressure is consta

Vera_Pavlovna [14]

Explanation:

T1/V1 = T2/V2

V2 = T2 x V1/T1

V2 = 296.15x535/319.15

V2 = 496.44mL

5 0

3 years ago

Elements are arranged in groups by similar atomic structure on the periodic table. This allows for an element's properties to be

svlad2 [7]

D) energy required to remove a valence electron

Explanation:

The ionization energy is the energy required to remove a valence electron from an element.

Different kinds of atoms bind their valence electrons with different amount of energy.

To remove the electrons, energy must be supplied to the atom.
The amount of energy required to remove the an electron in the valence shell is the ionization energy or ionization potential.
The first ionization energy is the energy needed to remove the most loosely bound electron in an atom in the ground state.
The ionization energy measures the readiness of an atom to loose electrons.

Learn more:

Ionization energy brainly.com/question/5880605

#learnwithBrainly

4 0

3 years ago

Read 2 more answers

Daniel claims that the product of two square roots of integers is always rational. His reasoning is given in the example below.

Katen [24]

Incorrect....................

6 0

3 years ago