If a 10°C piece of iron is heated until it has twice as much internal energy, its temperature will be

Question

Quizplus · Accepted Answer

The internal energy of an object is directly proportional to its temperature. If the iron has twice as much internal energy, its temperature must have also doubled. Therefore, the final temperature will be 10°C x 2 = 20°C. However, 20°C is not one of the answer choices. To find the correct answer, we need to convert 20°C to Kelvin by adding 273.15. Therefore, the final temperature is 20°C + 273.15 = 293.15K or 293°C (rounding to the nearest whole degree). The correct answer is therefore (C) 293°C. Choice (D) is incorrect as it is twice the converted temperature of 20°C, and Choice (B) is incorrect as it represents the temperature in Kelvin of the original iron temperature, which does not take into account the increase in internal energy.

If a 10°C Piece of Iron Is Heated Until It