Question

the quantity of heat required to raise the temperature of 1kg of water from 20°C to 50°C is-
(a) 300 cal
(b) 30,000 cal (c) 3000 cal (d) none of these​

Answer 1

mass of substance =1000g

change in temperature (delta T)=30°C

specific heat of water=1 cal/gm°c

as Q=ms(delta T)

=1000×30×1=30 000cal

option (b) is correct

Answer 2

c)3000 Cal................