If the pressure of a confined gas doubles and its volume decreases by a factor of four, how will its kelvin temperature change?

Temperature halves or decreases by a factor of 2

The relationship between pressure, volume, and temperature can be expressed as;

 PV/T

and we can compare one state to another by this expression;

P1V1/T1 = P2V2/T2

in this case, we can say P1, V1 and T1 are all equal to 1 and have the pressure doubled, such that P2 = 2 and the volume decreases by a factor of four, so that V = 1/4; then T2 will be equal to;

(1)(1)/1 = (2)(1/4)/T2

  1 = 0.5/T2

T2 = 0.5 or 1/2

Temperature will therefore half or decrease by a factor of 2

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.