1.68 L of helium gas in a balloon at room temperature (25 °C) was put in an oven at 250°C and allowed to come to thermal equilibrium with its new surroundings. What would happen to the gas inside the balloon if the walls of the balloon werethermally insulated? What is AU, AH, w and q in this case?

Given, volume of helium gas = 1.68 L room temperature, T1=25°C=(25+273)K=298 K oven temperature ,…

Answered: What would happen to the gas inside the…

Living By Chemistry: First Edition Textbook

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ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction

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Insoluble PbBr2(s) precipitates when solutions of Pb(NO3)2(aq) and NaBr(aq) are mixed. Pb(NO3)2(aq) + 2 NaBr(aq) PbBr2(s) + 2 NaNO3(aq) rH = ? To measure the enthalpy change, 200. mL. of 0.75 M Pb(NO3)2(aq) and 200. mL of 1.5 M NaBr(aq) are mixed in a coffee-cup calorimeter. The temperature of the mixture rises by 2.44 C. Calculate the enthalpy change for the precipitation of PbBr2(s), in kJ/mol. (Assume the density of the solution is 1.0 g/mL., and its specific heat capacity is 4.2 J/g K.)
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What would happen to the gas inside the balloon if the walls of the balloon were thermally insulated? What is AU, AH, w and q in this case?