Answer:
Explanation:
The expression for the calculation of the enthalpy change of a process is shown below as:-
Where,
is the enthalpy change
m is the mass
C is the specific heat capacity
is the temperature change
Thus, given that:-
Mass of object = 36.2 g
Specific heat = 12.5 J/g°C
So,
As the ice cube melts, it absorbs<span> heat </span>energy<span> from its surroundings. Water molecules frozen in the form of ice are tightly bound. So yes it does.</span><span>
</span>
Answer:
269 grams CuCl₂
Explanation:
To find the mass of CuCl₂ (copper (II) chloride), you need to (1) find moles CuCl₂ (via the molarity equation using the volume and molarity) and then (2) convert moles to grams (via the molar mass from the periodic table). The final answer should have 3 sig figs because the given number with the least amount of sig figs (4.00 mol/L) also has 3 sig figs.
<u>(Step 1)</u>
500.0 mL / 1,000 = 0.5000 L
Molarity (mol/L) = moles / volume (L)
4.00 mol/L = moles / 0.5000 L
(4.00 mol/L) x (0.5000 L) = moles
2.00 = moles
<u>(Step 2)</u>
Molar Mass (CuCl₂) = 63.546 g/mol + 2(35.45 g/mol)
Molar Mass (CuCl₂) = 134.446 g/mol
2.00 moles CuCl₂ 134.446 g
--------------------------- x --------------------- = 269 g CuCl₂
1 mole
Answer:
oxygen . 1 percent and 4 percent the are the awnsers
Difference between Gas and Vapour:
Gas:
A thermodynamic state in which a substance exists only in one phase i.e. Gas phase. In above given examples N₂, He and CO₂ exists as gases at room temperature. These gases cannot form a solid or liquid phase along with gas phase as these states requires very low temperatures.
Vapours:
It is a thermodyanamic state in which a substance exists in more than one phase. In given options Sulfur can exist in vapor state. This is because sulfur exists in a cyclic or chain form due to catenation (self linkage property). Therefore, a lower members of S allotrops can form a vapours.
