For a close system, which of the following statement is correct? ( )
A. matter can exchange
B. energy can exchange
C. energy cannot exchange
D. nothing can exchange
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The formula of the first law of thermodynamics is ( ).
A. ∆U=Q-W
B. ∆U=W-Q
C. ∆U=Q+W
D. ∆Q=U+W
Please find the wrong statement as below. ( )
A. Vapor pressure lowering is one of colligative properties of diluted solution
Boiling point will elevate because of vapor pressure lowering
C. The vapor pressures of all liquid depend on the given temperature
D. Freezing point will elevate because of vapor pressure lowering
At the freezing point, the relationship between the vapor pressure of solid P1 and the vapor pressure of liquid P2 is ( ). (the solid and liquid are the same substance)
A. p1>p2
B. p1
C. p1=p2
D. uncertain
The osmolarity of 0.154 mol•L-1 NaCl solution is ( ).
A. 0.154 mmol•L-1
B. 154 mmol•L-1
C. 308 mmol•L-1
D. 462 mmol•L-1
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