calculate the heat gained by the water: Q=CmΔT heat lost by sample: ms* cs *(Ts-T) = mw *cw (T -Tcw) + mc *cc *(T-Tcw) solve for the specific heat of the unknown known unknown (ms) mass of unknown= 240.40g (Cs) specific heat of sample: ? (Ts) Temp initial of sample: assume 100°C (mc) mass of dry cup: 31.3g (mw) mass of water: 127.3g (cw) specific heat of water: 4186 J/kg °C (Tcw) initial temp of water: 12°C (Cc) specific heat of cup: use Aluminium 900 J/kg °C (T) final temp 23°C (I tried it and I'm not sure if I have a correct answer, so if you can please do it step by step to show me where I made mistakes)
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
calculate the heat gained by the water: Q=CmΔT
heat lost by sample: ms* cs *(Ts-T) = mw *cw (T -Tcw) + mc *cc *(T-Tcw)
solve for the specific heat of the unknown
| known | unknown |
| (ms) mass of unknown= 240.40g | (Cs) specific heat of sample: ? |
| (Ts) Temp initial of sample: assume 100°C | |
| (mc) mass of dry cup: 31.3g | |
| (mw) mass of water: 127.3g | |
| (cw) specific heat of water: 4186 J/kg °C | |
| (Tcw) initial temp of water: 12°C | |
| (Cc) specific heat of cup: use Aluminium 900 J/kg °C | |
| (T) final temp 23°C |
(I tried it and I'm not sure if I have a correct answer, so if you can please do it step by step to show me where I made mistakes)
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