A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The 1 atm pressure piston cylinder is also submerged in a large insulated water bath. (See sketch at right.) cylinder The temperature of the water bath is monitored, and it is determined from this data that 343. kJ of heat flows into the water ba system during the reaction. The position of the piston is also monitored, and it is determined from this data that the piston does 127. kJ of work on the system during the reaction. gases exothermic Is the reaction exothermic or endothermic? O endothermic O up Does the temperature of the water bath go up or down? O down O neither O in Does the piston move in or out? O out O neither O absorb Does the reaction absorb or release energy? release neither How much energy does the reaction absorb or release? Round your answer to 3 significant O kJ digits. Oo Oo O Ol0 o o

You want to determine the heat capacity of a piece of ceramic. You place a 94.9 g piece of ceramic, initially at 78.3°C, into a calorimeter containing 358.6 g of water at 21.1°C. The two reach thermal equilibrium at a final temperature of 25.4°C. Determine the heat capacity of the ceramic. The heat capacity of water is 4.18 J/g°C. Please show work

Every day a certain amount of water evaporates from Earth’s oceans, lakes, and land surface and forms water vapor and clouds in the atmosphere. Every day a certain amount of rain falls back to Earth. Make the reasonable assumption that, on average, the energy absorbed by the evaporation and lifting of the water is equal to the energy released by its condensation and falling back to earth. The evaporation of one mole of water requires approximately 40.6×103 J of heat. An equal amount of heat is released when a mole of water condenses. The annual volume of rainfall on Earth is approximately 4.9×105 km3 and the average cloud altitude is 8.9 km above Earth’s surface. How much energy, in joules, is required every day to evaporate and lift the water?

thermor A 59.1 g sample of brass, which has a specific heat capacity of 0.375 J-g that contains 100.0 g of water. The temperature of the water starts off at 17.0 °C. When the temperature of the water stops , is put into a calorimeter (see sketch at right) insulate containe water changing it's 20.5 °C. The pressure remains constant at 1 atm. sample - Calculate the initial temperature of the brass sample. Be sure your answer is rounded to 2 significant digits. a ca Check Explanation 2021 McGraw H LLC A Rights eserved Address pe here to search