Question

A system did the work of 785 J afther loss of 525 J heat.
Find the change in its internal change​

Answer 1

Answer:

ΔU = -1310 J

Explanation:

q = -525 J

w = -785 J

ΔU = q + w

ΔU = -525 + (-785)

ΔU = -525 -785

ΔU = -1310 J

Mark as Brainliest

Answer 2

Answer:

The change in the internal energy, ΔU, for the given system measured is $-1370J$.

Explanation:

Given,

• The work done by the system, W = $785J$

As we know,

• If the work is done by the system, it will be negative.

Therefore,

• The work done by the system, W = $-785J$

• The heat loss = $525J$

Also,

• If heat is lost by the system, it will also be negative.

Therefore,

• The heat loss, Q = $-525J$

The change in its internal energy, ΔU =?

Now,

• From the first law of thermodynamics;
• $\Delta U = Q + W$

After putting the given values in the equation, we get:

• $\Delta U = -525J + ( -785J )$
• $\Delta U = -1370J$

Hence, the change in its internal energy, ΔU = $-1370J$.