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- 10 g of a piece of metal is taken by a student to find its specific heat capacity. Metal is tied with a string and suspended it aboveboiling water that is at 100 °C. Sufficient time is allowed for metal to reach the temperature of boiling water. Also, with agraduated cylinder, 10 ml of distilled water is transferred in a test tube and its temperature is measured as 25 °C. After 10minutes, metal which is over the boiling water is taken and put into water that is in the test tube. 5 minutes later, temperature ofwater in the test tube is measured as 32 °C. Calculate the specific heat capacity of metal. (Specific heat capacity of water is4.18 J/g. °C and density of water is 1 g/ml)A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them 1 atm pressure piston cylinder water bath gases do 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 cylinder is also submerged in a large insulated water bath. (See sketch at right.) The temperature of the water bath is monitored, and it is determined from this data that 290. kJ of heat flows out of the system during the reaction. The position of the piston is also monitored, and it is determined from this data that the system does 315. kg of work on the piston during the reaction. O 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? O release O neither How much energy does the reaction absorb or release?…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 cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder The temperature of the water bath is monitored, and it is determined from this data that 245. kJ of heat flows into the system during the reaction. The position of the piston is also monitored, and it is determined from this data that the system does 324. kJ of work on the piston during the reaction. water bath gases O 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? O release O neither How much energy does the reaction absorb or release? Be…
- 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 cylinder is also submerged in a 1 atm pressure piston cylinder large insulated water bath. (See sketch at right.) water bath The temperature of the water bath is monitored, and it is determined from this data that 160. kJ of heat flows out of the system during the reaction. The position of the piston is gases also monitored, and it is determined from this data that the piston does 199. kJ of work on the system during the reaction. olo Ar exothermic Is the reaction exothermic or endothermic? endothermic up Does the temperature of the water bath go up or down? down neither in Does the piston move in or out? out neither absorb Does the reaction absorb or release energy? release neither How much energy does the reaction absorb or release? Be sure your answer…A 124 gram ice cube at -33°C is placed into a 2.50 kg iron container (assume no energy is transfered as heat to or from the surroundings). The temperature of the iron container drops by 55°C. Calculate the final temperature in °C of the water in the container. The density of water is 1.00g/mL and the heat capacity of ice to be 37.7 J mol-1K-1 and the heat capacity of water is 75.3 J mol-1K-1. The molar enthalpy of fusion of water is 6.01 kJ/mol and the heat capacity of iron is 0.45 J/(gK).7 using specific heat capacity to find temperature change
- 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 cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder The temperature of the water bath is monitored, and it is determined from this data that 116. kJ of heat flows out of the water ba system during the reaction. The position of the piston is also monitored, and it is determined from this data that the system does 205. kJ of work on the piston during the reaction. gases exothermic Is the reaction exothermic or endothermic? endothermic up Does the temperature of the water bath go up or down? down neither in Does the piston move in or out? out neither absorb Does the reaction absorb or release energy? release neither How much energy does the reaction absorb or release? Round your answer to 3…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 cylinder is also submerged in a large insulated water bath. (See sketch at right.) The temperature of the water bath is monitored, and it is determined from this data that 198. kJ of heat flows out of the system during the reaction. The position of the piston is also monitored, and it is determined from this data that the system does 214. kJ of work on the piston during the reaction. Is the reaction exothermic or endothermic? Does the temperature of the water bath go up or down? Does the piston move in or out? Does the reaction absorb or release energy? How much energy does the reaction absorb or release? Be sure your answer has the correct. number of significant digits. OOO O exothermic O endothermic O up O down Oneither O in out Oneither O absorb O…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 cylinder is also submerged in a 1 atm pressure piston cylinder large insulated water bath. (See sketch at right.) water bath The temperature of the water bath is monitored, and it is determined from this data that 156. kJ of heat flows out of the system during the reaction. The position of the piston is gases also monitored, and it is determined from this data that the piston does 128. kJ of work on the system during the reaction. | exothermic Is the reaction exothermic or endothermic? x10 endothermic up ? Does the temperature of the water bath go up or down? down neither in Does the piston move in or out? out neither absorb Does the reaction absorb or release energy? release neither How much energy does the reaction absorb or release? Be sure your answer…
- LOM NC DA A piece weigh ing 59.07g metal was heated to 100. 0°C and then put it into 100.0mL (initially at 23.7°C). OF water the metal and water allowed to Come to On equilibnum tem perature, detemined to be 27.8°C. Asuming heat lost to the no environ ment , calcul ate the upecific heat the metal-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 cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder The temperature of the water bath is monitored, and it is determined from this data that 341. kJ of heat flows into the system during the reaction. The position of the piston is also monitored, and it is determined from this data that the piston does 359. kJ of work on the system during the reaction. water bath gases exothermic Is the reaction exothermic or endothermic? endothermic up Does the temperature of the water bath go up or down? down neither in Does the piston move in or out? out neither absorb Does the reaction absorb or release energy? release neither How much energy does the reaction absorb or release? Be sure your answer has the…O THERMOCHEMISTRY Understanding the definitions of heat and work 15 ARLYC 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 cylinder is also submerged in a large insulated water bath. (See sketch at right.) 1 atm pressure piston cylinder From previous experiments, this chemical reaction is known to absorb 393. kJ of energy. water bath The position of the piston is monitored, and it is determined from this data that the piston does 194. kJ of work on the system during the reaction. gases O 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 in Does heat flow into or out of the gas mixture? O out O neither How much heat flows? Be sure your answer has the correct…
