When a gas is heated, it absorbs 174 joules of heat from the surroundings. at the same time, the gas expands, doing pressure-volume work (p · v work) on the surroundings that is equal to 312 joules. (a) determine whether the amounts of heat (q) and work (w) exchanged should have positive or negative signs. heat (q)

Heat is absorbed by the system then the sign of Q is positive.

The system does work on the surroundings, then the sign of W is negative.

Explanation:

Given that,

Absorbs heat = 174 J

Surrounding energy = 312 J

We need to calculate the heat

Using thermodynamics first law

Where,= Change in internal energy

Q = heat change of the system

W = work

According to thermodynamics first law,

Heat is absorbed by the system then the sign of Q is positive.

The system does work on the surroundings, then the sign of W is negative.

Hence, This is the required solution.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.