Home
Class 11
CHEMISTRY
The first law of thermodynamics for a cl...

The first law of thermodynamics for a closed system is dU = dq + dw, where dw = `dw_(pv)+dw_("non-pv")`. The most common type of `w_("non-pv")` is electrical work. As per IUPAC convention work done on the system is positive.
A system generates 50 J electrical energy, has 150 J of pressure-volume work done on it by the surroundings while releasing 300 J of heat energy. What is the change in the internal energy of the sytem?

A

`-500`

B

`-100`

C

`-300`

D

`-200`

Text Solution

Verified by Experts

The correct Answer is:
D
`DeltaU=q+w`
`DeltaU=-300+(-50+150)=-200`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.1 To Q.30)|6 Videos

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 1 (Q.31 To Q.60)|2 Videos

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|20 Videos

Similar Questions

Explore conceptually related problems

The first law of thermodynamics for a closed system is dU = dq + dw, where dw = dw_(pv)+dw_("non-pv") . The most common type of w_("non-pv") is electrical work. As per IUPAC convention work done on the system is positive. A system generates 50 J of electrical energy and delivers 150 J of pressure-volume work against the surroundings while releasing 300 J of heat energy. What is the change in the internal energy of the system?

160 J of work is done on the system and at the same time 100 J of heat is given out. What is the change in the internal energy ?

180 J of work is done on the system and at the same time 120 J of heat is given out. What is the change in the internal energy?

A system does 100J work on surroundings gy absorbing 150J of heat. Calculate the change in internal energy.

In a process, a system does 238 J of work on its surrounding by absorbing 54 J heat. What is the change in internal energy of system during the operation?

A system does 40J work on surrounding as well as gives out 20J energy. Calculate the change in internal energy.

A system is provided 50J of heat and work done on the system is 20J . What is the change in the internal enegry?

In a process, a system does 140 J of work on the surroundings and only 40 J of heat is added to the system, hence change in internal energy is

A system is provided 50J of heat and work done on the system is 10Joule What is the change in internal energy

If the amount of heat given to a system is 50 J and work done on the system is 15 J, then change in internal energy of the system will be