my original question was:
how do i figure this out??
How much heat does your body lose when 2.46 g of sweat evaporates from your skin at 25°C?
chem - DrBob222, Tuesday, February 22, 2011 at 10:52pm
q = mass water x delta Hvaporization.
chem - Rebekah, Wednesday, February 23, 2011 at 5:44pm
so 44.0 kj/1mol X 2.46g? i tried that and got it wrong. am i suppose to convert g to kj?
To figure out how much heat your body loses when 2.46 g of sweat evaporates from your skin at 25°C, you can use the equation q = mass water x delta Hvaporization.
First, you need to convert the mass of sweat from grams to moles. To do this, divide the mass of sweat (2.46 g) by the molar mass of water (18.015 g/mol). This will give you the number of moles of water.
Next, you need to use the molar quantity of water to find the heat of vaporization. The heat of vaporization is typically given in kilojoules per mole (kJ/mol). In this case, it is given as 44.0 kJ/mol. So, you can multiply the number of moles of water by the heat of vaporization (44.0 kJ/mol) to get the amount of heat lost (q) in kilojoules (kJ).
Finally, remember to convert from kilojoules to joules by multiplying by 1000 if necessary.
In summary:
1. Convert the mass of sweat from grams to moles.
2. Multiply the number of moles by the heat of vaporization to get the amount of heat lost.
3. Convert from kilojoules to joules if necessary.