Question

You carry out an exothermic reaction inside a Styrofoam cup calorimeter, using a temperature probe to monitor the temperature throughout the reaction. You find that the temperature increases 7.40 °C during the reaction. The specific heat of the reaction solution is known to be 5.59 J/g•°C, and the mass of the solution was measured as 36.0 g. Calculate q, the heat for this reaction, in kJ. Be sure to include the correct sign for your answer.

What I did was the following;

q=(5.59 J/g•°C)(36.0g)(7.40)(1 kJ/ 1000 J) =1.49 kJ

however the program I am working with says I'm wrong.

Answer 1

Your numbers are correct. So would he reaction be -1.49kJ or 1.49kj if it is exothermic.

Answer 2

Your numbers are correct. So would the reaction be -1.49kJ or 1.49kj if it is exothermic.

Answer 3

The program still states this is incorrect

Answer 4

Your numbers look correct, except you should have -1.49Kj