I need some1 to explain heat capacity to me because the way my lesson is teaching it is EXTREMELY confusing!! A simple explanation would be nice!
Dumb it down 4 a 7th grader!!!!!
If you could use the following question in the explanation, that would be great because this is y i needed an explanation:
How many calories are required to melt a 10g ice cube which is at 0° C?
A) 10 cal
B) 80 cal
C) 800 cal
D) 540 cal
(I was thinking A or B, but im just not sure...)
thnx a bunch!!!
Oh my, you question is not about heat capacity but about the latent heat of fusion of water.
to melt one gram of ice at 0 deg C requires 224 Joules or 79.8 Calories
so to melt 10 grams requires 2240 Joules or 798 calories (so pick 800)
specific heat capacity is when there is a temperature change, not a phase change at constant temp like ice to water
then the formula is:
heat in = heat capacity *mass * change in temperature
Oh, sorry! my lesson is labeled "Heat Capacity" so i guess i got kinda confused there... thnx Damon!
You are welcome, good luck.
Sure! I'll explain heat capacity in a simplified way for you. Heat capacity is a measure of how much heat energy is needed to raise the temperature of an object. Think of it like this: different things need different amounts of heat to get hot.
Now, let's apply this concept to your ice cube melting question. The heat capacity of water is important here. To melt the ice cube, we need to provide enough heat energy to raise its temperature from 0°C to its melting point. Once it reaches the melting point, additional heat energy will not raise the temperature further, but instead be used to convert the solid ice into liquid water.
To calculate how much heat energy is required, we can use a formula:
Q = m * C * ΔT
Q represents the amount of heat energy, m is the mass of the substance, C is the specific heat capacity, and ΔT is the change in temperature.
In this case, the substance is ice, which has a specific heat capacity of 0.5 cal/g°C. The mass of the ice cube is given as 10g. The change in temperature is from 0°C to the melting point, which is also 0°C since we want to melt it, not heat it up further.
Using the formula, we can calculate:
Q = 10g * 0.5 cal/g°C * (0°C - 0°C)
Q = 0 cal
Therefore, no calories are required to melt a 10g ice cube at 0°C. So, none of the options (A, B, C, D) are correct for this specific question.
Remember, this explanation assumes that no external heat source is used and we are solely relying on the internal energy of the ice cube itself to melt it.