C. Tareas de la semana. Analiza (100%)

1. La longitud de un puente es 100 m cuando la

temperatura es 20 °C. ¿En cuánto aumenta su

longitud en un día de verano en que la

temperatura es 40 °C (αpuente = 2 x 10-4

/°C)?

2. Se tiene un círculo metálico de radio 1 cm y β =

2,02 x 10-4

/°C. ¿En cuántos °C se debe

elevar la temperatura, de tal modo que el

nuevo radio del círculo sea igual a 1.02 cm?

3. Un beaker o vaso de precipitado contiene 1000

cm3 de mercurio lleno hasta el borde. Si se

incrementa la temperatura en 100 °C y el beaker

alcanza un volumen de 1 009 cm3

, ¿cuánto de

mercurio se derrama (αHg = 6 X 10-5

/°C)?​

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

Problem #3 (ch. 1, problem 15)the ideal gas law provides one way to estimate the pressure exerted by a gas on a container. the law isí‘ťí‘ť=푛푛푛푛푛푛푉푉more accurate estimates can be made with the van der waals equationí‘ťí‘ť=푛푛푛푛푛푛푉푉â’푛푛푟푟â’푞푞푛푛2푉푉2where the term nb is a correction for the volume of the molecules and the term an2/v2is a correction for molecular attractions. the values of a and b depend on the type of gas. the gas constant is r, the absolutetemperature is t, the gas volume is v, and the number of moles of gas molecules is indicated by n. if n = 1 mol of an ideal gas were confined to a volume of v = 22.41 l at a temperature of 0â°c (273.2k), it would exert a pressure of 1 atm. in these units, r = 0.0826.for chlorine gas (cl2), a = 6.49 and b = 0.0562. compare the pressure estimates given by the ideal gas law and the van der waals equation for 1 mol of cl2 in 22.41 l at 273.2 k. what is the main cause of the difference in the two pressure estimates, the molecular volume or the molecular attractions?