Initial data: isobaric heating (P (pressure) = const); the gas was heated to 200 K (T2 = T1 + 200); the gas volume increased by 1.5 times (V2 = 1.5V1).
With isobaric heating, the equality is true: V1 / T1 = V2 / T2 and T1 = V1 * T2 / V2 = V1 * (T1 + 200) / 1.5V1 = (T1 + 200) / 1.5.
1.5T1 = 200 + T1.
1.5T1 – T1 = 200.
0.5T1 = 200.
T1 = 200 / 0.5 = 400 K.
Answer: Before isobaric heating, the gas was at a temperature of 400 K.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.