Question

100 g of water is heated from 30 degree C to 50 degree C the change in its internal energy
a 8.4 k J
b 84 k J
c 2.1 k J
d 4.2k J

Answer 1

@Opcode @kropot72 @Hero @inkyvoyd @Kainui @Luigi0210

Answer 2

\[Q = mc \Delta T\]

Answer 3

@Schrodingers_Cat could you explain the formula?

Answer 4

The change in heat will equal the change in internal energy.

Answer 5

mc is equal to 100 kg ??

Answer 6

100 x 10^-3 kg * ?

Answer 7

c is the specific heat of water.

Answer 8

M is mass and DeltaT is the change in temperature.

Answer 9

Q = 100 X 417 x 20
Am I put the right values ???

Answer 10

@Schrodingers_Cat can you please show me your solution ?

Answer 11

Q = 100(4.179)(50 -30) = 8352 J

Answer 12

so in kJ it will be 8.35 right ?

Answer 13

Yep :)

Answer 14

Oh thank you so much ^_^ @Schrodingers_Cat

Answer 15

can you help me with few more ?