A two liter container holds half a mole of an ideal gas at a pressure of 12.5 at

Question

A two liter container holds half a mole of an ideal gas at a pressure of 12.5 atmospheres. What is the gas temperature? (R = 0.0821 1iter-ATM/mole-K) a. 1975 K b. 1187 K c. 965 K d. 610 K e. 273 K A window pane is halt a centimeter thick and has an area of 1 m^2. The temperature difference between the inside and outside surfaces of the pane is 15C degree. What is the rate of heat flow through this window? (Thermal conductivity for glass is 0.8 J/s-m-C degree.) a. 500 J/s b. 48.000 J/s c. 1.000 J/s d. 2.100 J/ A 500 Hz whistle is moved toward a listener at a speed of 10.0 m/s. At the same time, the listener moves at a speed of 20.0 m/s in a direction away from the whistle. What is the apparent frequency heard by the listener? (The velocity of sound is 340 m/s.) a. 547 Hz b. 473 Hz c. 533 Hz d. 486 Hz A 2 kg block of ice is at STP while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 times 10^5 J/kg) a. zero b. 584 J/K c. 1223 J/K d. 2446 J/K 125 grams of dry ice (solid CO_2) is dropped Into a beaker containing 500 grams of 66 degree C water. The dry ice converts directly to gas, leaving the solution. When the dry ice is gone, the final temperature of the water is 29 degree C. What is the heat of vaporization of solid CO_2? a. 37 cal/gram b. 74 cal/gram c. 111 cal/gram d. 148 cal/gram A tuning fork is sounded above a resonating tube (one end closed) which resonates at a length of 0.20 m and again at 0.60 m. If the tube length were extended further, at what point will the tuning fork again create a resonance condition? a. 0.8 m b. 1.0 m c. 1.2 m d. 1.6 m AS the ideal gas expands from pressure F_1 and volume V_1 to pressure F_2 and volume V_2 along the indicated straight line, it is possible that: a. the temperature Stays constant.

Explanation / Answer

1)

let the temperature is T

Using ideal gas equation

P * V = n *R * T

12.5 * 2 = 0.50 * 0.0821 * T

T = 610 K

the temperature of the gas is 610 K

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