College

Dear beloved readers, welcome to our website! We hope your visit here brings you valuable insights and meaningful inspiration. Thank you for taking the time to stop by and explore the content we've prepared for you.
------------------------------------------------ How many grams of a substance (Specific Heat = 1.15 cal/g °C) can be heated from 44 °C to 77 °C if 300 cal are used?

A. 97.5 g
B. 52.3 g
C. 7.9 g
D. 4.5 g

Answer :

Final answer:

To find the number of grams of the substance that can be heated, use the formula Q = mcΔT and solve for m. Plugging in the given values, we can calculate the mass of the substance to be 8.9 g.


Explanation:

To find the number of grams of the substance that can be heated, we can use the formula:

Q = mcΔT

where:

  • Q is the heat energy (in calories)
  • m is the mass of the substance (in grams)
  • c is the specific heat capacity of the substance (in cal/g °C)
  • ΔT is the change in temperature (in °C)

Plugging in the given values:

300 cal = m * 1.15 cal/g °C * (77 °C - 44 °C)

Simplifying the equation:

300 = 33.75m

Dividing both sides by 33.75:

m = 8.89 g

Therefore, the correct answer is 8.9 g.


Learn more about specific heat capacity here:

https://brainly.com/question/28302909