Low vacuum is achieved inside a 1.0 m³ sealed chamber where the gas pressure measures 0.0011 at 20C. If the temperature rises to 30C, then total translational kinetic energy of the gas molecules inside the chamber increases by an amount equal to:

a. 160 J

b. 3.8 J

c. 84 J

d. 2.5 J

e. 5.7J

two ice cubes (15.0 g each) are dropped into 319 g of water in a styrofoam cup. The water is initially at a temperature of 20.0c and the ice at -10.0c. ignore any heat exchange with the internal environment. the final temperature of the water is equal to

a. 11.5C

b. 17.8C

c. 11.0C

d. 12.0C

e. 10.6C

In an insulated container, 50 g of ice at 0C is mixed with 20 g of steam at 100C. the final temperature of the mixture is equal to

a. 100C

b. 50C

c. 71C

d. 130C

e. 40C