chemistry

posted by .

Can somebody please help me with this question? That'd be great. Thanks!

Determine the amount of heat needed in the following:

the number of calories to heat 25 grams of water from 22 degrees celcius to 44 degrees celcius.


Q= m c deltaTemp
= 25g*1cal/gC*(44-22)C
=25*22 calories. If you want it in other units, either convert, or use the specific heat in those units.


Thank you! I have a problem that asks for the number of joules. Should I do it in calories first and convert it to joules?


As Bob Pursley pointed out to you in his post, you may use 1 cal/g*C, then convert to Joules knowing that 1 cal = 4.184 joules OR you may use 4.184 joules/g*C in place of the 1 cal in the calculations (for specific heat) of q = mcdeltaT and get the joules directly.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry HELP

    A 46.2 gram sample of copper is heated to 95.4 degrees celcius and then place into a calorimeter containing 75.0 grams of water at 19.6 degrees celcius. The final temp of the water and copper is 21.8 degrees celcius. Calculate the …
  2. ap chemistry

    A sample of KOH is dissolved into 100.0 grams of water in a coffee cup calorimeter. if the dissolution produces 6.45 kJ of heat and the temperature change is 25.4 degrees celcius to 40.0 degrees celcius, how much KOH (in grams) is …
  3. chemistry

    using the values for heat of fusion, specific heat of water, or heat of vaporization, calculate the amount of heat energy. Calories needed to warm 20.0g of water at 15 degrees Celsius to 72 degrees Celsius (one step) Show work please
  4. science

    tori wants to increase the tempreature of 500 grams of water from 20 degrees celcius to 100 degrees celecius if the specific heat of water is 4.18j/g. degrees celcius how much heat is needed ?
  5. Chemistry

    How many joules of heat are needed to heat 25.0 g of ice at -5.0 degrees celcius to a final temperature of 40.0 degrees celcius?
  6. Chemistry

    If 150.0 grams of iron at 95.0 degrees Celcius, is placed in an insulated container containing 500.0 grams of water at 25.0 degrees Celcius, and both are allowed to come to the same temperature, what will that temperature be?
  7. Chemistry

    Calculate the amount of heat in joules required to heat 43 grams of water from 28 degrees celcius to the normal boiling point 100 degrees celcius
  8. chemistry

    Liquid water has a specific heat of 4.184 J/g degrees celcius. If 50 grams of water is heated from10 to 55 degrees celcius, what is the heat energy in joules needed to heat this water
  9. physics

    120 grams of an unknown metal at a temperature of 95 degrees celcuius is poured into 140 grams of aluminum calorimeter containing 220 grams of water. If the inital temperature of the water and calorimeter was 15 degree celcuius and …
  10. Physics

    A physicist converted 2 kg of water at 37 degrees celcius to steam at 100 degrees celcius. Assuming no heat is lost, calculate the amount of energy needed to heat to 100 degrees celcius.

More Similar Questions