How to calculate (delta)H?

Since we are figuring out the heat of reaction based on the temperature increase of the water, we first need to know how much water we have. We added 100mL of HCL solution to 100mL of NH4 solution, so we have 200mL of water (.2L). Since 1mL of water is about 1 gram of water, we know we have 200 grams of water. We also know the heat capacity of water is 4.18J per gram per degree celcius, meaning it takes 4.18 joules to raise the temperature of one gram of water one degree C. Since our 200 grams of water was raised by a temperature of 2.34 degrees C, we just multiply 200g x 4.18 J/gC x 2.34 C to get our total number of J (see how the units cancel and we are left with just joules, or Delta H). However, we also must take into account the heat capacity of the calorimeter, whose temperature was also raised 2.34 degrees. It takes 480J to raise the calorimeter one degree, so multiple 480J x 2.34 to get the joules of heat needed to raise the calorimeter temperature. Now add the two values (joules required to raise the water's temperature and joules to raise the calorimeters temperature) and that is your overall delta H for this reaction. However, it's asking for the delta H per MOLE of reaction. Since we only have .2 moles of each substance (and thus .2 moles of reaction overall), we must multiple our answer by 5 to get the delta H for one mole of reaction. So just add up the joules and multiply by 5 and you're good. I would ask your professor what to do, though, when it's a reaction where it's something like 2A + 3B = 2C, since that is technically one mole of reaction but we can obviously see that we have 2 moles of A and 3 moles of B to equal one mole of reaction, and that takes more time to explain.

I got my BFP!!! I am so excited!!!?

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Why does it seem like my hair isnt growing at all? Its been the same length for 2 years now?

that sounds exactly like me, its because you straighten your hair everyday! for awhile just try to put it up in a ponytail or something,leave it go natural and it will start to grow and look longer trust me! :)

Meat eaters, Do you respect a vegetarian's right, Or in other words you had someone who didn't eat meat come?

for supper, would you feel insulted if they declined the meat dish, would you feel insulted? Or do you respect their right? I know it is a stupid question, but I ask because in school once we had a Pow wow, and then food after that and my teacher forced me to eat the meat, she said I was being all rude when I told her I don't eat meat so yeah do you respects vegetarians when they come over?

What do yall think of the idea for what im gonna do for mascot tryouts?

Okay well you know the song "Rocky?" well im gonna go in to the gym with boxing gloves and a rope, like im getting ready for a fight. Then when i get to the center im go throw the glove off and robes. run up to the three judge and give them a hug then dance back to the center and began my tryout.*dancing*. then leave to the song Can't tuch this.

Crohn - treatment, side effects (skin, insomnia and...hunger?

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How can i create a Gwen's stefani/fergie's look as far as clothing from head to toe (please no skirts)

Can somebody please help me create inspired gwen and fergie looks i know that fergie wears huge earrings which i LOVE!