A220.0-ml sample of helium gas is in a cylinder with a movable piston at 105 kpa and 275 k. the piston is pushed in until the sample has a volume of 95.0 ml. the new temperature of the gas is 310. k. what is the new pressure of the sample? (1) 5l.1 kpa(2) 216 kpa(3) 243 kpa(4) 274 kpa

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.