sophiapeterson0744
sophiapeterson0744 sophiapeterson0744
  • 30-05-2019
  • Chemistry
contestada

calculate the energy needed to change 12g of ice at -20°C to liquid water at 0°C.

Respuesta :

superman1987
superman1987 superman1987
  • 30-05-2019

Answer:

504 J.

Explanation:

  • To solve this problem, we can use the relation:

Q = m.c.ΔT,

where, Q is the amount of heat absorbed by ice (Q = ??? J).

m is the mass of the ice (m = 12.0 g).

c is the specific heat of the ice (c of steam = 2.1 J/g.°C).

ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = 0.0°C - (-20.0°C) = 20.0°C).

∴ Q = m.c.ΔT = (12.0 g)(2.1 J/g.°C)(20.0°C) = 504 J.

Answer Link

Otras preguntas

The first phase of writing a research essay involves gathering, organizing, and interpreting information. the final stage of this process involves:
f(x) = x^2 -­ 16 and g(x) = x+4. Find f/g and its domain
What was the direct result of the september 11 2001 terrorist attack on the united states answers?
Once stimulated, a network of neurons will stay in a state of readiness for hours or even days. a. True b. False
Autotrophs differ from heterotrophs in that only autotrophs...
Find the total volume of the castle including the towers answer
How do you find the holes, vertical, and horizontal asymptote of an equation?
The perimeter of a square garden is 284 feet. how long is each side
Who did hercules free from the chair of forgetfulness?
Math is annoying! Can someone help me please?