please help on this chemistry homework i need help ASAP PLEASE HELP thank youuuuu so much

Question

It takes 55.0  to raise the temperature of an 11.4  piece of unknown metal from 13.0 to 24.3 . What is the specific heat for the metal?

Express your answer with the appropriate units.

Answer 1

Hello Samantha,

I am not sure if you ever received help. Please always post the questions with the units. You can always send me a direct message on Wyzant if you need something immediately and I can tutor you for free if it is just one question assuming I am available as long as it is not a test. Please know that we should not answer any questions from the test.

I am assuming it is 55.0 Joules and 11.4 grams of the metal.

Use the equation q= mass * specific heat * change in temperature

55.0 Joules = 11. 4 grams * specific heat * (24.3 - 13.0 ) ⁰C

55.0 Joules = 11.4 grams * Specific heat * 11.3 ⁰C

11.4 grams * 11.3 ⁰C 11.4 grams * 11.3 ⁰C

Specific heat of the metal = 0.427 J/g-⁰C

Answer 2

Hello, Samantha,

Specific heat is defined as the amount of energy (e.g., Joules) that it takes to raise the temperature of a specified amount (grams, moles, etc.) of a substance by 1 degree c. A high specific heat means it takes a lot of energy to raise the material by 1 degree C. The specific heat of water is 4.86 J/gC. 4.186 Joules of energy is required to raise the temperature of 1 gam of water by 1 degree C. Iron, by the way is only 0.44

J/gC. Aha! So that's why pans transmit heat so quickly and why that pot of water is taking so long to boil.

Be aware that the units of specific heat can, and do, come with a wide array of terms, including calories, moles, kg, F or K, etc. Always be sure the units cancel to give the correct result.

The relationship for this idea of heat capacity is q = cmDT, where q is heat energy, m is the quantity of material, and DT is the temperature change,

You state that "It takes 55.0  to raise the temperature of an 11.4  piece of unknown metal from 13.0 to 24.3." There are no units shown, so the problem really can't be answered. But I'll assume the sentence was meant to read "It takes 55.0 J to raise the temperature of an 11.4 g  piece of unknown metal from 13.0 C to 24.3 C."

Use the equation and solve for c:

55.0J = c*(11.4g)(11.3C)

c = 55.0J/((11.4g)(11.3C))

c = 0.427 J/gC

Iron's specific heat is 0.44 J/gC, so see if your unknown mystery material rusts.

Bob