![]() ![]() The hot gasses (in the form of steam) have to release energy into the environment in the form of heat to cool to the point that they can form liquid water, meaning that the formation of H 2O is exothermic. 1 Dry bulb temperature Tdb C Molar mass of dry air: M 28.9645 g/mol 2 Wet bulb temperature Twb C Molar mass of water: M 18.016 g/mol 3 Dew point temperature Tdp C 2. 16.) Specific isobaric heat capacity in saturation state a.) Of boiling water as a functi on of temperature cpSatLiqTW(T) CpLT(T) b.) Of boiling water as a functio n of pressure cpSatLiqPW(P) CpLp(p) c.) Of saturated steam as a func tion of temperature cpSatVapTW(T) CpVT(T) d. This makes sense - H 2 and O 2 are gasses, while H 2O, the product, is a liquid. Calculation Details Step 1: Determine Properties of Steam Produced Using the Steam Property Calculator, properties are determined using Steam Pressure and the selected second parameter (Temperature, Specific Enthalpy, Specific Entropy, or Quality). Since the sign is negative, we know that our reaction is exothermic. In our example, our final answer is -13608 J.Beware strongly exothermic reactions - these can sometimes signify a large release of energy, which, if rapid enough, can cause an explosion. The larger the number itself is, the more exo- or endo- thermic the reaction is. On the other hand, if the sign is negative, the reaction is exothermic. If the sign of your final answer for ∆H is positive, the reaction is endothermic. One of the most common reasons that ∆H is calculated for various reactions is to determine whether the reaction is exothermic (loses energy and gives off heat) or endothermic (gains energy and absorbs heat). Determine whether your reaction gains or loses energy.
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