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Pizza Roll's

Posted: Wed Feb 12, 2020 2:44 pm
by Clara Cho 2K
Can some one explain to me #12b from the pizza rolls packet? How do I divide the process up into three steps?

Re: Pizza Roll's

Posted: Wed Feb 12, 2020 3:04 pm
by JChen_2I
Step one is raising the temperature of the reactants to 200C. Step 2 is the actual reaction at 200C (deltaH is given). Step 3 is cooling the products back down to 37C. Add all these values together to get the total change in enthalpy of the reaction.

Re: Pizza Roll's

Posted: Wed Feb 12, 2020 5:18 pm
by Sydney Pell 2E
JChen_2I wrote:Step one is raising the temperature of the reactants to 200C. Step 2 is the actual reaction at 200C (deltaH is given). Step 3 is cooling the products back down to 37C. Add all these values together to get the total change in enthalpy of the reaction.


What equations would you use to raise the temperature of the reactants to 200C and cool them back down?

Re: Pizza Roll's

Posted: Tue Feb 18, 2020 12:06 pm
by Ashley Fang 2G
You would use delta H = nC(delta T) for each of the reactants or products.