When water evaporates at constant pressure, the sign of the change in enthalpy

A. is negative.

B. is positive.

C. depends on the temperature.

D. depends on the volume of the container.

E. does not exist; that is, the enthalpy change is zero.

Why would a block of wood have more friction than a cube

Which liquid is the most viscous A. Syrup B. water C. Milk D. Apple juice

What might you expect to observe from this double-displacement reaction? 2NaOH (aq) + MgCl2 (aq) - > 2NaCl + Mg (OH) 2 A. NaCl precipitate will be formed B. Mg (OH) 2 precipitate will be formed C. One of these products will bubble out as a gas

Match the chromatography term with its definition. The volume of solvent traveling through the column per unit time. The elapsed time between sample injection and detection.

Describe one main use for each fuel:coal, oil, and natural gas

The reaction A (g) ⇌ 2 B (g) A (g) ⇌ 2 B (g) has an equilibrium constant of K = 0.010 K = 0.010. What is the equilibrium constant for the reaction B (g) ⇌ 1 2 A (g) ?

A 0.239 gram sample of a gas in a 100-mL flask exerts a pressure of 603 mm Hg at 14 degrees Celsius. What is the gas?

Which of the following is true about a redox reaction? In a redox reaction, an electron is lost by the reducing agent. In a redox reaction an electron is lost by the oxidizing agent.

Is the equation above balanced? How do you know? Mg + 2HCl → MgCl2 + H2

What characteristics do atoms of carbon-12, carbon-13, and carbon-14 have in common?