Answer:
Final temperature = 6.00 °C
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 water = 200.0 g
Specific heat = 4.18 J/g°C
Let final temperature be x °C
= -11.7 kJ (Negative sign as heat is lost)
Also, 1 kJ = 1000 kJ
= -11700 J
So,
Final temperature = 6.00 °C
Answer : The mass of in the solution is, 19.4 grams.
Explanation : Given,
Molarity of solution = 0.50 M
Volume of solution = 250 mL
Molar mass of = 155.6 g/mole
Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.
Formula used :
Now put all the given values in this formula, we get:
Therefore, the mass of in the solution is, 19.4 grams.
Limited Genetic variability
Answer:
1) Starting boiling point is 100°C
Explanation: Boiling point is a constant temperature. At 10 minutes, substance L boils constantly at 100°C till 14 minutes.
2) The temperature of substance L steadily increases from 0 to 8 minutes. Then it is constant from 10 to 14 minutes.
3). Substance L is a pure substance. Substance L is pure water because pure water boils at 100°C
e):
Substance L is Water
Reason: Substance L has boiling point of 100°C as well as water
Answer:
The specific heat of the metal is 0.466
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
The equation that allows calculating heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case:
- Q= 2330 J
- c= ?
- m= 25 g
- ΔT= 200 °C
Replacing:
2330 J= c*25 g* 200 °C
Solving:
c=0.466
<u><em>The specific heat of the metal is 0.466 </em></u><u><em></em></u>