You carry out an reaction inside a Styrofoam cup calorimeter (assume it has the
ID: 979425 • Letter: Y
Question
You carry out an reaction inside a Styrofoam cup calorimeter (assume it has the same properties as the one in the lab manual), using a temperature probe to monitor the temperature throughout the reaction. You find that the temperature increases 6.76 °C during the reaction. The specific heat of the reaction solution is known to be 6.61 J/g•°C, and the mass of the solution was measured as 36.5 g. Determine the following quantities:
You carry out an reaction inside a Styrofoam cup calorimeter (assume it has the same properties as the one in the lab manual), using a temperature probe to monitor the temperature throughout the reaction. You find that the temperature increases 6.76 degree C during the reaction. The specific heat of the reaction solution is known to be 6.61 J/g C, and the mass of the solution was measured as 36.5 g. Determine the following quantities: The q_rxn, the heat for this reaction, in kJ. The q_cal, the heat gained/lost for the calorimeter contents and body, in kJ. Be sure to include the correct sign for your answers! Is this reaction endothermic or exothermic?Explanation / Answer
Heat of the reaction = mass * specific heat * change in temperature
= 36.5* 6.61*6.76
= 1628.484 joules
In KJ = 1.63 KJ
2. Heat lost = heat gain
= 1.63 KJ
3. Temperature increases means heat is evolved during the reaction. So it exptheexot reaction.
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