An object is moved from a room at a temperature of 70 ºF to a room at a temperature of 90 º F. What happens to the object when it's placed in the room with a higher temperature?

The object is initially at temperature of 70 ºF. When it is moved into the room at 90 º F, the temperature of the object is lower than the temperature of the surroundings, so the air in the room starts to release heat to the object, until they both (the room and the object) will reach thermal equilibrium. After thermal equilibrium is reached, the temperatures of the room and the object will be equal, at some value between 70 ºF and 90 º F.