PV Diagrams

The work done by the system/gas in this PV-diagram is

• negative

• positive

• zero

Answer explanation

The volume is getting smaller.

The work done by the system/gas in this PV-diagram is

• negative

• positive

• zero

Answer explanation

"Zero," because the volume does not change. $W=P\Delta V$

The work done by the system/gas in this PV-diagram is

• negative

• positive

• zero

Answer explanation

Positive because the final PV is larger than the initial PV.

$W=P\Delta V$

The work done by the system/gas in this PV-diagram is

• negative

• positive

• zero

Answer explanation

The pressure stays the same and volume increases.

$W=P\Delta V$

The work done by the surroundings in this PV-diagram is

• negative

• positive

• zero

Answer explanation

The pressure stays the same and volume increases. This means the work by the gas is positive. The work of the surroundings is the opposite sign of the work of the system/gas. So it would be negative.

 $W_{system}=P\Delta V$ 

Tags

NGSS.HS-PS3-1

The work done by the surroundings in this PV-diagram is

• negative

• positive

• zero

Answer explanation

No change in volume means, no work ...at all.

$W_{system}=P\Delta V$

What equal zero for this PV-diagram

• Change in Internal Energy

• System's Thermal Energy

• Work by the system/gas

Answer explanation

This diagram is an isothermal line. Which means the internal energy does not change.

$\Delta U=0$

What goes to zero on this PV-diagram

• Change in internal energy

• System's thermal energy

• System's work

Answer explanation

The volume must change for work to occur.

$W_{system}=P\Delta V$

This graph does not have a change in volume so no work occurs.

Tags

NGSS.HS-PS3-1

What goes to zero on this PV-diagram

• Change in internal energy

• System's thermal energy

• system/gas's work

Answer explanation

This is an adiabatic process. Adiabatic means the no thermal energy crosses into the system. Q = 0

Tags

NGSS.HS-PS3-1