Question

The internal energy of the gas in a gasoline engine cylinder decreases by 210 J. If 60 J of work is done by the gas, the energy transferred as heat is:​

Answer 1

Answer:

Energy cannot be created nor destroyed, as is stated in the law of conservation of energy. In this first law of thermodynamics we are told that, for an isolated or closed system, the change in the internal energy of the system is equal to the sum of the heat added or supplied to the system and the work done by the system

Answer 2

Answer:

-150

Explanation:

equation: ΔU = Q - W

given

ΔU= -210 (negative because it said decreases)

W = 60

rearrange the equation Q = W + ΔU

solve

Q = 60 + (-201)

Q = -150