Question

How many joules must be added to a 1000 g iron skillet to increase its temperaturefrom 25°C to 250°C? The specific heat of iron is 0.449 J/gºC.A) 449 JB) 101,025 JC) 50,000 JD) 112,250 J

Answer 1

Answer:

$B$

Explanation:

Here, we want to get the number of Joules needed to be added

Mathematically, this is the amount of heat needed which could be calculated by:

$Q\text{ = mc}\Delta T$

where:

m is the mass of the iron which is 1000 g

c is the specific heat capacity which is 0.449

delta T is the temperature change which is the difference between final and initial temperature (250-25 = 225 degrees celsius)

Substituting the values, we have it that:

$Q\text{ = 1000}\times0.449\text{ }\times\text{ 225 = 101,025 J}$