Chem 6

A 32.5 g piece of aluminum

A) 212

Exactly 123.7 J will raise the temperature of 10.0 g of a metal from 25.0°C to 60.0°C. What is the specific heat capacity of the metal?

B) 0.353 J/g°C

One mole of an ideal gas is expanded from a volume of 1.00 liter to a volume of 8.93 liters against a constant external pressure of 1.00 atm. How much work (in joules) is performed on the surroundings? Ignore significant figures for this problem. (T = 300 K; 1 L·atm = 101.3 J)

B) 803 J

For a particular process q = 20 kJ and w = 15 kJ. Which of the following statements is true?

c) E = 35 kJ

Which of the following statements is correct?

c) The system does work on the surroundings when an ideal gas expands against a constant external pressure

A 140.0-g sample of water at 25.0°C is mixed with 111.7 g of a certain metal at 100.0°C. After thermal equilibrium is established, the (final) temperature of the mixture is 29.6°C. What is the specific heat of the metal, assuming it is constant over the temperature range concerned?

C) 0.22 J/g C

In the lab, you mix two solutions (each originally at the same temperature) and the temperature of the resulting solution decreases. Which of the following is true?

C) The chemical reaction is absorbing energy.

Calculate the work for the expansion of CO2 from 1.0 to 4.7 liters against a pressure of 1.0 atm at constant temperature.

D) -3.7 L·atm

What is the specific heat of a metal if it requires 178.1 J to change the temperature of 15.0 g of the metal from 25.00 C to 32.00 C?

D) 1.70 J/g C

A property that is independent of the pathway is called an intensive property. True or False?

False

When a system performs work on the surroundings, the work is reported with a negative sign.

True