What is the final temperature of water when 2.70 grams of calcium chloride is dissolved in 25 mls of water at 25.5 Celcius.
To determine the final temperature of water after dissolving calcium chloride, we can use the equation for heat transfer:
q = m * c * ΔT
Where:
- q is the heat transferred
- m is the mass of the substance (water)
- c is the specific heat capacity of the substance
- ΔT is the change in temperature
First, we need to calculate the heat transferred (q) when dissolving calcium chloride in water:
q = m * c * ΔT
The mass of water (m) is given as 25 ml. However, to use this value in the equation, we need to convert it to grams. The density of water is approximately 1 g/ml, so the mass of water can be calculated as:
m = volume * density = 25 ml * 1 g/ml = 25 g
Next, we need to determine the specific heat capacity (c) of water. The specific heat capacity of water is approximately 4.18 J/(g·°C).
Now, we can substitute the values into the equation:
q = m * c * ΔT
q = 25 g * 4.18 J/(g·°C) * ΔT
The heat transferred in this case will be equal to the heat absorbed by the water when the calcium chloride dissolves.
At this point, we need more information to calculate the final temperature. Specifically, we need to know the heat capacity (C) of the calcium chloride solution. The heat capacity represents the amount of heat energy required to raise the temperature of the solution by one degree Celsius.
If we know the heat capacity of the calcium chloride solution, we can calculate the final temperature using the following equation:
q = C * ΔT
However, without the specific heat capacity of the calcium chloride solution, we cannot determine the final temperature.