Thermochemistry-mathematical model

Look at the segment labeled solid on the graph. Which equation would you use to determine the amount of energy released or absorbed?

• Q =mcΔt

• Q =mΔH_f

• Q =mΔHv

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Look at the segment labeled melting on the graph. Which equation would you use to determine the amount of energy released or absorbed?

• Q =mcΔt

• Q =mΔH_f

• Q =mΔHv

Tags

NGSS.MS-PS1-4

Look at the segment labeled liquid on the graph. Which equation would you use to determine the amount of energy released or absorbed?

• Q =mcΔt

• Q =mΔH_f

• Q =mΔHv

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Look at the segment labeled boiling on the graph. Which equation would you use to determine the amount of energy released or absorbed?

• Q =mcΔt

• Q =mΔH_f

• Q =mΔHv

Tags

NGSS.MS-PS1-4

Look at the segment labeled gas on the graph. Which equation would you use to determine the amount of energy released or absorbed?

• Q =mcΔt

• Q =mΔH_f

• Q =mΔHv

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Look at the segment labeled gas on the graph. Which "account" is the energy going into?

• E_th

• E_ph

• E_ch

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Look at the segment labeled boiling on the graph. Which "account" is the energy going into?

• E_th

• E_ph

• E_ch

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

When the substance starts boiling, the particles

• speed up

• start spreading apart, overcoming attractions

• Speed up and spread apart over coming attractions

• None of the above

Tags

NGSS.MS-PS1-4

When the substance is heating in the liquid phase, the particles

• speed up

• start spreading apart, overcoming attractions

• Speed up and spread apart over coming attractions

• None of the above

Tags

NGSS.MS-PS1-4

 $Heat\ capacity\ of\ water\ =4.18\frac{\text{j}}{\text{g oC}}$  
 $Heat\ capacity\ of\ ice\ is\ 2.1\frac{\text{j}}{\text{g oC}}$  
 $Heat\ capacity\ of\ steam\ is\ 2.0\frac{\text{j}}{g\ oC}$   $Heat\ of\ vaporization\ of\ water\ is\ 2260\frac{\text{j}}{\text{g}}$   $Heat\ of\ fusion\ of\ water\ is\ 334\frac{\text{j}}{\text{g}}$  
In the segment labeled gas, which constant would you use to calculate amount of heat being absorbed or released?

• 4.18 j/g oC

• 2.1 j/g oC

• 2.0 j/g oC

• 2260 j/g

• 334 j/g

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4