While most constellations are only visible to us in different seasons, some are always there 24/7/365 because they are positioned close to the Polar Axis, or the Polaris.
The total heat that is involved in this change is 23632.5 J.
<h3>What is the energy involved?</h3>
We know that energy is involved as matter is changing from one state to another and in this case what we have is a 75g sample of liquid water at 10°C ends up as ice at -10°C.
There are are about three steps of the change in the energy;
1) Heat required until the water would change to ice
2) Latent heat of fusion of ice
3) Heat required until the temperature drops to -10°C
Thus;
1) H = mcdT
m = mass of the water
c = specific heat capacity of water
dT = temperature change
H = 75 * 4.18 * (0 - 10)
H = -3135 J
2) Heat of fusion =
H = mL
m = mass of ice
L = latent heat of fusion of ice
336 J g^-1 * 75g
= 25200 J
3) Heat required to decrease the temperature futher
H = 75 * 2.09 * (0 - (-10))
H = 1567.5J
Total heat required = 25200 J + 1567.5J -3135 J
= 23632.5 J
Learn more about heat:brainly.com/question/28302909
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The heat energy from the fire is transferred to the pot by
- <em>radiation</em> — the hot coals radiate heat to the pot.
- <em>convection</em> — the hot gases from the fire travel upward until they reach the pot
The pot absorbs the heat energy and <em>conducts</em> the heat to the water inside.
The hot water <em>conducts</em> heat to the peas in three steps:
- warming the frozen ice and peas to 0 °C.
- thawing the ice and peas at 0 °C.
- heating the peas to 100 °C and cooking them at that temperature.
<em>Note</em>: Heat always flows spontaneously from a hotter to a cooler object.
Answer: Compound B is covalent because sharing of electrons makes relatively weaker bonds.
Explanation:
Ionic bonds: Type of chemical bonds in which transfer of electrons from less electro-negative atom to highly electro-negative atom occurs and with higher value of bond energy.
Covalent bonds: Type of a chemical bond in which sharing of an electrons between the two atoms occurs. Here electro-negativity difference between the atom is very less or zero. Lower value of the bond energy than that of the ionic bonds.
Bond energy of compound A is 769 kJ/mol higher than the bond energy of the compound B that is 432 kJ/mol which means that compound A is ionic and compound B is covalent.
So, compound B is covalent because sharing of electrons makes relatively weaker bonds.
Answer:
Sodium (Na) and Chlorine (CI)
Explanation:
