Question

How much energy is needed to change the temperature of 100g of water by 25 degree celsius?

Answer 1

Answer:

The amount of heat needed is, 10465 grams.

Solution :

Formula Use:

Q =m × c ×∆t

where,

Q = heat gained

m = mass of the substance = 100 g

c = heat capacity of water= 4.186 J/g°C

∆t = Change in temperature = 50 - 25 = 50°C

Now put all the given values in the above formula, we get the amount of heat needed.

Q=100g × 4.186J / g°C × 25°C

Q= 10465J

Therefore, the amount of heat needed is, 10465 grams