Question

Which of the following would require the greatest number of calories? 1. Heating 1000 g of water from 10◦C to 12◦C 2. Heating 10 g of water from 10◦C to 40◦C 3. Heating 100 g of water from 10◦C to 50◦C 4. Heating 1 g of water from 10◦C to 80◦C​

Answer 1

Answer:

Case 3 would require most

Explanation:

Let us first calculate the heat energy of all the four cases

Fomrula for heat energy calculation is;

Q = m x c x Change in temperature

Case 1

Q = 1000 x C x (12-10)

Q = 2000 C

Case 2

Q = 10 x C x (40-10)

Q = 300 C

Case 3

Q = 100 x C x (50-10)

Q = 4000 C

Case 4

Q = 1 x C x (80-10)

Q = 70 C

So comparing all the four case, case 3 would require most

Answer 2

Answer:

broo ..

.

who is this or mere question pr hi q aa rhe ho koi problem hai to btao...

.

I just talk to you..

koi problem hai to answer kr do..