A coffee cup calorimeter contains 480.0 grams of water at 25.0 oC. To it are added: 380.0 grams of water at 53.5 oC 525 grams of water at 65.5 oC Consider the heat absorbed by the Styrofoam as negligible, calculate the expected final temperaturein oC
A. 38.2 oC
B. 88.7 oC
C. 67.6 oC
D. 48.2 oC
E. 94.4 oC
The correct answer should be D. I don't know how to do this question.
This question is from grade 12 university preparation level. The answer has to do something with rates of chemical reactions but I don't know what the answer is.
. When hydrogen peroxide H2O2 is used as an antiseptic on open wounds, bubbles form as a result of the following chemical reaction.
H2O2(aq) --------------> 2H2O(l) + O2(g)
This same hydrogen peroxide decomposes very slowly via the same chemical reaction when left in a bottle, even if temperature is increased to 36.8 oC (body temperature). Explain the two observations.
1 answer