1. The problem statement, all variables and given/known data Hey there guys, first of all English is not my main language so it will be a little hard for me to say things in english. I am dutch native speaker so I will translate most of the things in english using google translator. I hope you guys are okay with that. Task : One wants the heat capacity of a calorimeter. It does so by one in the empty calorimeter, which has a temperature of 19.3 °C, 50 grams of benzene with a temperature of 13, 5 °C is added. This drops the temperature of the calorimeter to 15, 9 °C. a)Calculate the value of the heat capacity of this calormeter. b)Directly after this (the temperature of the calorimeter is still 15.9 °C), a Platinum bullet is added, which has a mass of 15.0 gram, in the calorimeter. This platinum ball has been kept in a glass flame beforehand; the temperature of the calorimeter runs to 23.7 °C . determine the temperature of the gas flame. Okay, I had no problem answering a. Now I did the same thing in b, but my answer does not match the one from my book. I tried to look if I missed any ##-## or ##+## sign , but still no luck. I even checked whether I filled the wrong number or not, and to me it seems that everything is correct. The Answer should be 604 °C , but I keep getting below 604 °C. I just want to know if I am doing something wrong or maybe the book answer could be wrong. 2. Relevant equations ##Q = m.c. \bigtriangleup T## ##Q = C .ΔT## 3. The attempt at a solution I've uploaded 2 pictures of the calculations I did. According to my book the answer I got for a is correct.